From dbd45eef54865d966b8008cac329d05710a6310e Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Mon, 30 Sep 2024 13:21:12 +0200 Subject: [PATCH 01/35] firmware_loader: Reorganize kerneldoc parameter names Reorganize kerneldoc parameter names to match the parameter order in the function header. Problems identified using Coccinelle. Signed-off-by: Julia Lawall Link: https://lore.kernel.org/r/20240930112121.95324-27-Julia.Lawall@inria.fr Signed-off-by: Greg Kroah-Hartman --- drivers/base/firmware_loader/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c index 324a9a3c087a..bb368193d969 100644 --- a/drivers/base/firmware_loader/main.c +++ b/drivers/base/firmware_loader/main.c @@ -1075,8 +1075,8 @@ EXPORT_SYMBOL_GPL(firmware_request_platform); /** * firmware_request_cache() - cache firmware for suspend so resume can use it - * @name: name of firmware file * @device: device for which firmware should be cached for + * @name: name of firmware file * * There are some devices with an optimization that enables the device to not * require loading firmware on system reboot. This optimization may still From cec78a59abc9b1a06f742cb96479fc0bb1fe4e90 Mon Sep 17 00:00:00 2001 From: Zijun Hu Date: Tue, 17 Sep 2024 18:42:56 +0800 Subject: [PATCH 02/35] list: Remove duplicated and unused macro list_for_each_reverse Remove macro list_for_each_reverse due to below reasons: - it is same as list_for_each_prev. - it is not used by current kernel tree. Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/20240917-fix_list-v2-1-d2914665e89f@quicinc.com Signed-off-by: Greg Kroah-Hartman --- include/linux/list.h | 8 -------- 1 file changed, 8 deletions(-) diff --git a/include/linux/list.h b/include/linux/list.h index 5f4b0a39cf46..29a375889fb8 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -686,14 +686,6 @@ static inline void list_splice_tail_init(struct list_head *list, #define list_for_each(pos, head) \ for (pos = (head)->next; !list_is_head(pos, (head)); pos = pos->next) -/** - * list_for_each_reverse - iterate backwards over a list - * @pos: the &struct list_head to use as a loop cursor. - * @head: the head for your list. - */ -#define list_for_each_reverse(pos, head) \ - for (pos = (head)->prev; pos != (head); pos = pos->prev) - /** * list_for_each_rcu - Iterate over a list in an RCU-safe fashion * @pos: the &struct list_head to use as a loop cursor. From 0ebe74c53b8b62bde7b02415d28e75aa25d6c2e6 Mon Sep 17 00:00:00 2001 From: "Dr. David Alan Gilbert" Date: Sun, 29 Sep 2024 15:11:12 +0100 Subject: [PATCH 03/35] drivers/base: Remove unused auxiliary_find_device auxiliary_find_device has been unused since commit 1c5de097bea3 ("net/mlx5: Fix mlx5_get_next_dev() peer device matching") which was the only use since it was originally added. Remove it. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Ira Weiny Link: https://lore.kernel.org/r/20240929141112.69824-1-linux@treblig.org Signed-off-by: Greg Kroah-Hartman --- Documentation/driver-api/auxiliary_bus.rst | 1 - drivers/base/auxiliary.c | 29 ---------------------- include/linux/auxiliary_bus.h | 4 --- 3 files changed, 34 deletions(-) diff --git a/Documentation/driver-api/auxiliary_bus.rst b/Documentation/driver-api/auxiliary_bus.rst index cec84908fbc0..b236de773e1d 100644 --- a/Documentation/driver-api/auxiliary_bus.rst +++ b/Documentation/driver-api/auxiliary_bus.rst @@ -24,7 +24,6 @@ Auxiliary Device Creation .. kernel-doc:: drivers/base/auxiliary.c :identifiers: auxiliary_device_init __auxiliary_device_add - auxiliary_find_device Auxiliary Device Memory Model and Lifespan ------------------------------------------ diff --git a/drivers/base/auxiliary.c b/drivers/base/auxiliary.c index 7823888af4f6..69b7c93613d6 100644 --- a/drivers/base/auxiliary.c +++ b/drivers/base/auxiliary.c @@ -335,35 +335,6 @@ int __auxiliary_device_add(struct auxiliary_device *auxdev, const char *modname) } EXPORT_SYMBOL_GPL(__auxiliary_device_add); -/** - * auxiliary_find_device - auxiliary device iterator for locating a particular device. - * @start: Device to begin with - * @data: Data to pass to match function - * @match: Callback function to check device - * - * This function returns a reference to a device that is 'found' - * for later use, as determined by the @match callback. - * - * The reference returned should be released with put_device(). - * - * The callback should return 0 if the device doesn't match and non-zero - * if it does. If the callback returns non-zero, this function will - * return to the caller and not iterate over any more devices. - */ -struct auxiliary_device *auxiliary_find_device(struct device *start, - const void *data, - device_match_t match) -{ - struct device *dev; - - dev = bus_find_device(&auxiliary_bus_type, start, data, match); - if (!dev) - return NULL; - - return to_auxiliary_dev(dev); -} -EXPORT_SYMBOL_GPL(auxiliary_find_device); - /** * __auxiliary_driver_register - register a driver for auxiliary bus devices * @auxdrv: auxiliary_driver structure diff --git a/include/linux/auxiliary_bus.h b/include/linux/auxiliary_bus.h index 31762324bcc9..65dd7f154374 100644 --- a/include/linux/auxiliary_bus.h +++ b/include/linux/auxiliary_bus.h @@ -269,8 +269,4 @@ void auxiliary_driver_unregister(struct auxiliary_driver *auxdrv); #define module_auxiliary_driver(__auxiliary_driver) \ module_driver(__auxiliary_driver, auxiliary_driver_register, auxiliary_driver_unregister) -struct auxiliary_device *auxiliary_find_device(struct device *start, - const void *data, - device_match_t match); - #endif /* _AUXILIARY_BUS_H_ */ From 765399553714e934a219d698953d435f4f99caa7 Mon Sep 17 00:00:00 2001 From: Keita Morisaki Date: Sat, 28 Sep 2024 20:50:05 +0800 Subject: [PATCH 04/35] devres: Fix page faults when tracing devres from unloaded modules The devres ftrace event logs the name of the devres node, which is often a function name (e.g., "devm_work_drop") stringified by macros like devm_add_action. Currently, ftrace stores this name as a string literal address, which can become invalid when the module containing the string is unloaded. This results in page faults when ftrace tries to access the name. This behavior is problematic because the devres ftrace event is designed to trace resource management throughout a device driver's lifecycle, including during module unload. The event should be available even after the module is unloaded to properly diagnose resource issues. Fix the issue by copying the devres node name into the ftrace ring buffer using __assign_str(), instead of storing just the address. This ensures that ftrace can always access the name, even if the module is unloaded. This change increases the memory usage for each of the ftrace entry by 12-16 bytes assuming the average devres node name is 20 bytes long, depending on the size of const char *. Note that this change does not affect anything unless all of following conditions are met. - CONFIG_DEBUG_DEVRES is enabled - ftrace tracing is enabled - The devres event is enabled in ftrace tracing Fixes: 09705dcb63d2 ("devres: Enable trace events") Reviewed-by: Andy Shevchenko Signed-off-by: Keita Morisaki Link: https://lore.kernel.org/r/20240928125005.714781-1-keyz@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/trace.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/base/trace.h b/drivers/base/trace.h index e52b6eae060d..3b83b13a57ff 100644 --- a/drivers/base/trace.h +++ b/drivers/base/trace.h @@ -24,18 +24,18 @@ DECLARE_EVENT_CLASS(devres, __field(struct device *, dev) __field(const char *, op) __field(void *, node) - __field(const char *, name) + __string(name, name) __field(size_t, size) ), TP_fast_assign( __assign_str(devname); __entry->op = op; __entry->node = node; - __entry->name = name; + __assign_str(name); __entry->size = size; ), TP_printk("%s %3s %p %s (%zu bytes)", __get_str(devname), - __entry->op, __entry->node, __entry->name, __entry->size) + __entry->op, __entry->node, __get_str(name), __entry->size) ); DEFINE_EVENT(devres, devres_log, From 0ee4dcafda9576910559f0471a3d6891daf9ab92 Mon Sep 17 00:00:00 2001 From: Zijun Hu Date: Wed, 18 Sep 2024 22:48:13 +0800 Subject: [PATCH 05/35] lib: devres: Simplify API devm_iounmap() implementation Simplify devm_iounmap() implementation by dedicated API devres_release() compared with current solution, namely, devres_destroy() + iounmap() devres_release() has the following advantages: - it is simpler if devm_iounmap()'s parameter @addr is valid, namely @addr was ever returned by one of devm_ioremap() variants. - it can avoid unnecessary iounmap(@addr) if @addr is not valid. Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/20240918-fix_lib_devres-v1-1-e696ab5486e6@quicinc.com Signed-off-by: Greg Kroah-Hartman --- lib/devres.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/lib/devres.c b/lib/devres.c index 4fc152de6d8b..68ffcd5d9358 100644 --- a/lib/devres.c +++ b/lib/devres.c @@ -115,9 +115,8 @@ EXPORT_SYMBOL(devm_ioremap_wc); */ void devm_iounmap(struct device *dev, void __iomem *addr) { - WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match, + WARN_ON(devres_release(dev, devm_ioremap_release, devm_ioremap_match, (__force void *)addr)); - iounmap(addr); } EXPORT_SYMBOL(devm_iounmap); From 9bd133f05b1dca5ca4399a76d04d0f6f4d454e44 Mon Sep 17 00:00:00 2001 From: Zijun Hu Date: Wed, 18 Sep 2024 22:48:14 +0800 Subject: [PATCH 06/35] lib: devres: Simplify API devm_ioport_unmap() implementation Simplify devm_ioport_unmap() implementation by dedicated API devres_release(), compared with current solution, namely ioport_unmap() + devres_destroy(), devres_release() has below advantages: - it is simpler if devm_ioport_unmap()'s parameter @addr was ever returned by devm_ioport_map(). - it can avoid unnecessary ioport_unmap(@addr) if @addr was not ever returned by devm_ioport_map(). Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/20240918-fix_lib_devres-v1-2-e696ab5486e6@quicinc.com Signed-off-by: Greg Kroah-Hartman --- lib/devres.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/lib/devres.c b/lib/devres.c index 68ffcd5d9358..73901160197e 100644 --- a/lib/devres.c +++ b/lib/devres.c @@ -307,8 +307,7 @@ EXPORT_SYMBOL(devm_ioport_map); */ void devm_ioport_unmap(struct device *dev, void __iomem *addr) { - ioport_unmap(addr); - WARN_ON(devres_destroy(dev, devm_ioport_map_release, + WARN_ON(devres_release(dev, devm_ioport_map_release, devm_ioport_map_match, (__force void *)addr)); } EXPORT_SYMBOL(devm_ioport_unmap); From 81089c897a1243ac7bd56c231ce95fe95e555ada Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Wed, 30 Oct 2024 11:10:22 +0100 Subject: [PATCH 07/35] driver core: auxiliary bus: Spelling s/pecific/specific/ Fix a misspelling of the word "specific". Signed-off-by: Geert Uytterhoeven Reviewed-by: Leon Romanovsky Reviewed-by: Ira Weiny Link: https://lore.kernel.org/r/f232a09c377cbe11c81b4ab69d4e7bf016e746c8.1730282860.git.geert+renesas@glider.be Signed-off-by: Greg Kroah-Hartman --- drivers/base/auxiliary.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/base/auxiliary.c b/drivers/base/auxiliary.c index 69b7c93613d6..afa4df4c5a3f 100644 --- a/drivers/base/auxiliary.c +++ b/drivers/base/auxiliary.c @@ -92,7 +92,7 @@ * Auxiliary devices are created and registered by a subsystem-level core * device that needs to break up its functionality into smaller fragments. One * way to extend the scope of an auxiliary_device is to encapsulate it within a - * domain- pecific structure defined by the parent device. This structure + * domain-specific structure defined by the parent device. This structure * contains the auxiliary_device and any associated shared data/callbacks * needed to establish the connection with the parent. * From f87f132c5826b8635846348d3f4a9fb2f218057a Mon Sep 17 00:00:00 2001 From: Nikolay Borisov Date: Wed, 23 Oct 2024 08:11:18 +0300 Subject: [PATCH 08/35] cacheinfo: Don't opencode per_cpu_cacheinfo() That file contains a local helper that returns ->info_list, just use it. No functional changes. Signed-off-by: Nikolay Borisov Link: https://lore.kernel.org/r/20241023051118.888065-1-nik.borisov@suse.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/cacheinfo.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c index 7a7609298e18..5344df24fd09 100644 --- a/drivers/base/cacheinfo.c +++ b/drivers/base/cacheinfo.c @@ -367,9 +367,7 @@ static int cache_shared_cpu_map_setup(unsigned int cpu) cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); for_each_online_cpu(i) { - struct cpu_cacheinfo *sib_cpu_ci = get_cpu_cacheinfo(i); - - if (i == cpu || !sib_cpu_ci->info_list) + if (i == cpu || !per_cpu_cacheinfo(i)) continue;/* skip if itself or no cacheinfo */ for (sib_index = 0; sib_index < cache_leaves(i); sib_index++) { sib_leaf = per_cpu_cacheinfo_idx(i, sib_index); @@ -409,10 +407,7 @@ static void cache_shared_cpu_map_remove(unsigned int cpu) for (index = 0; index < cache_leaves(cpu); index++) { this_leaf = per_cpu_cacheinfo_idx(cpu, index); for_each_cpu(sibling, &this_leaf->shared_cpu_map) { - struct cpu_cacheinfo *sib_cpu_ci = - get_cpu_cacheinfo(sibling); - - if (sibling == cpu || !sib_cpu_ci->info_list) + if (sibling == cpu || !per_cpu_cacheinfo(sibling)) continue;/* skip if itself or no cacheinfo */ for (sib_index = 0; sib_index < cache_leaves(sibling); sib_index++) { From eafb1a86acbb3efc6e509e1b5529fc2383bdcd6d Mon Sep 17 00:00:00 2001 From: Zijun Hu Date: Mon, 28 Oct 2024 20:11:11 +0800 Subject: [PATCH 09/35] driver core: Put device attribute @wakeup_last_time_ms and its show() together Move location of dpm_sysfs_wakeup_change_owner() a bit to - Put device attribute @wakeup_last_time_ms and its show() together. - Put two different instances of dpm_sysfs_wakeup_change_owner() together. That will make better code layout. Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/20241028-fix_power_sysfs-v1-1-7b2fbeb14d47@quicinc.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/power/sysfs.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index a1474fb67db9..f8163b559bf9 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -509,14 +509,6 @@ static ssize_t wakeup_last_time_ms_show(struct device *dev, return sysfs_emit(buf, "%lld\n", msec); } -static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid, - kgid_t kgid) -{ - if (dev->power.wakeup && dev->power.wakeup->dev) - return device_change_owner(dev->power.wakeup->dev, kuid, kgid); - return 0; -} - static DEVICE_ATTR_RO(wakeup_last_time_ms); #ifdef CONFIG_PM_AUTOSLEEP @@ -541,6 +533,15 @@ static ssize_t wakeup_prevent_sleep_time_ms_show(struct device *dev, static DEVICE_ATTR_RO(wakeup_prevent_sleep_time_ms); #endif /* CONFIG_PM_AUTOSLEEP */ + +static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid, + kgid_t kgid) +{ + if (dev->power.wakeup && dev->power.wakeup->dev) + return device_change_owner(dev->power.wakeup->dev, kuid, kgid); + return 0; +} + #else /* CONFIG_PM_SLEEP */ static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid) From 6b8ab7241562caadba350dcd7a4b2719abd835ee Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Mon, 14 Oct 2024 14:28:49 +0200 Subject: [PATCH 10/35] driver core: constify devlink class The devlink class object is never modified and can be made constant. Signed-off-by: Bartosz Golaszewski Acked-by: Rafael J. Wysocki Acked-by: Saravana Kannan Link: https://lore.kernel.org/r/20241014122849.118766-1-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/base/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index a4c853411a6b..3826fcc82d0b 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -553,7 +553,7 @@ void device_link_wait_removal(void) } EXPORT_SYMBOL_GPL(device_link_wait_removal); -static struct class devlink_class = { +static const struct class devlink_class = { .name = "devlink", .dev_groups = devlink_groups, .dev_release = devlink_dev_release, From 0afcee132bbc9d7ef9c5bb4da9b6fe014a9afaa9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:30 +0000 Subject: [PATCH 11/35] sysfs: explicitly pass size to sysfs_add_bin_file_mode_ns() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Upcoming changes to the sysfs core require the size of the created file to be overridable by the caller. Add a parameter to enable this. For now keep using attr->size in all cases. Signed-off-by: Thomas Weißschuh Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-1-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/file.c | 8 ++++---- fs/sysfs/group.c | 3 ++- fs/sysfs/sysfs.h | 2 +- 3 files changed, 7 insertions(+), 6 deletions(-) diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index d1995e2d6c94..6d39696b4306 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -315,7 +315,7 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent, } int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent, - const struct bin_attribute *battr, umode_t mode, + const struct bin_attribute *battr, umode_t mode, size_t size, kuid_t uid, kgid_t gid, const void *ns) { const struct attribute *attr = &battr->attr; @@ -340,7 +340,7 @@ int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent, #endif kn = __kernfs_create_file(parent, attr->name, mode & 0777, uid, gid, - battr->size, ops, (void *)attr, ns, key); + size, ops, (void *)attr, ns, key); if (IS_ERR(kn)) { if (PTR_ERR(kn) == -EEXIST) sysfs_warn_dup(parent, attr->name); @@ -580,8 +580,8 @@ int sysfs_create_bin_file(struct kobject *kobj, return -EINVAL; kobject_get_ownership(kobj, &uid, &gid); - return sysfs_add_bin_file_mode_ns(kobj->sd, attr, attr->attr.mode, uid, - gid, NULL); + return sysfs_add_bin_file_mode_ns(kobj->sd, attr, attr->attr.mode, + attr->size, uid, gid, NULL); } EXPORT_SYMBOL_GPL(sysfs_create_bin_file); diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index d22ad67a0f32..45b2e92941da 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -87,6 +87,7 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj, if (grp->bin_attrs) { for (i = 0, bin_attr = grp->bin_attrs; *bin_attr; i++, bin_attr++) { umode_t mode = (*bin_attr)->attr.mode; + size_t size = (*bin_attr)->size; if (update) kernfs_remove_by_name(parent, @@ -104,7 +105,7 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj, mode &= SYSFS_PREALLOC | 0664; error = sysfs_add_bin_file_mode_ns(parent, *bin_attr, - mode, uid, gid, + mode, size, uid, gid, NULL); if (error) break; diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index 3f28c9af5756..8e012f25e1c0 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -31,7 +31,7 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent, const struct attribute *attr, umode_t amode, kuid_t uid, kgid_t gid, const void *ns); int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent, - const struct bin_attribute *battr, umode_t mode, + const struct bin_attribute *battr, umode_t mode, size_t size, kuid_t uid, kgid_t gid, const void *ns); /* From bebf29b18f34620e25f7e2bd9e4e4d8e34a8977d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:31 +0000 Subject: [PATCH 12/35] sysfs: introduce callback attribute_group::bin_size MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Several drivers need to dynamically calculate the size of an binary attribute. Currently this is done by assigning attr->size from the is_bin_visible() callback. This has drawbacks: * It is not documented. * A single attribute can be instantiated multiple times, overwriting the shared size field. * It prevents the structure to be moved to read-only memory. Introduce a new dedicated callback to calculate the size of the attribute. Signed-off-by: Thomas Weißschuh Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-2-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/group.c | 2 ++ include/linux/sysfs.h | 8 ++++++++ 2 files changed, 10 insertions(+) diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index 45b2e92941da..8b01a7eda5fb 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -98,6 +98,8 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj, if (!mode) continue; } + if (grp->bin_size) + size = grp->bin_size(kobj, *bin_attr, i); WARN(mode & ~(SYSFS_PREALLOC | 0664), "Attribute %s: Invalid permissions 0%o\n", diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index c4e64dc11206..4746cccb9589 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -87,6 +87,11 @@ do { \ * SYSFS_GROUP_VISIBLE() when assigning this callback to * specify separate _group_visible() and _attr_visible() * handlers. + * @bin_size: + * Optional: Function to return the size of a binary attribute + * of the group. Will be called repeatedly for each binary + * attribute in the group. Overwrites the size field embedded + * inside the attribute itself. * @attrs: Pointer to NULL terminated list of attributes. * @bin_attrs: Pointer to NULL terminated list of binary attributes. * Either attrs or bin_attrs or both must be provided. @@ -97,6 +102,9 @@ struct attribute_group { struct attribute *, int); umode_t (*is_bin_visible)(struct kobject *, struct bin_attribute *, int); + size_t (*bin_size)(struct kobject *, + const struct bin_attribute *, + int); struct attribute **attrs; struct bin_attribute **bin_attrs; }; From a1ab720ee50686d9e9dcb6935995a75696ed2493 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:32 +0000 Subject: [PATCH 13/35] PCI/sysfs: Calculate bin_attribute size through bin_size() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Stop abusing the is_bin_visible() callback to calculate the attribute size. Instead use the new, dedicated bin_size() one. Signed-off-by: Thomas Weißschuh Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-3-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pci-sysfs.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 5d0f4db1cab7..040f01b2b999 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -818,21 +818,20 @@ static struct bin_attribute *pci_dev_config_attrs[] = { NULL, }; -static umode_t pci_dev_config_attr_is_visible(struct kobject *kobj, - struct bin_attribute *a, int n) +static size_t pci_dev_config_attr_bin_size(struct kobject *kobj, + const struct bin_attribute *a, + int n) { struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); - a->size = PCI_CFG_SPACE_SIZE; if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) - a->size = PCI_CFG_SPACE_EXP_SIZE; - - return a->attr.mode; + return PCI_CFG_SPACE_EXP_SIZE; + return PCI_CFG_SPACE_SIZE; } static const struct attribute_group pci_dev_config_attr_group = { .bin_attrs = pci_dev_config_attrs, - .is_bin_visible = pci_dev_config_attr_is_visible, + .bin_size = pci_dev_config_attr_bin_size, }; /* @@ -1330,21 +1329,26 @@ static umode_t pci_dev_rom_attr_is_visible(struct kobject *kobj, struct bin_attribute *a, int n) { struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); - size_t rom_size; /* If the device has a ROM, try to expose it in sysfs. */ - rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); - if (!rom_size) + if (!pci_resource_end(pdev, PCI_ROM_RESOURCE)) return 0; - a->size = rom_size; - return a->attr.mode; } +static size_t pci_dev_rom_attr_bin_size(struct kobject *kobj, + const struct bin_attribute *a, int n) +{ + struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); + + return pci_resource_len(pdev, PCI_ROM_RESOURCE); +} + static const struct attribute_group pci_dev_rom_attr_group = { .bin_attrs = pci_dev_rom_attrs, .is_bin_visible = pci_dev_rom_attr_is_visible, + .bin_size = pci_dev_rom_attr_bin_size, }; static ssize_t reset_store(struct device *dev, struct device_attribute *attr, From 00ab6e97de0071b21a548e0a823348b3309970ba Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:33 +0000 Subject: [PATCH 14/35] nvmem: core: calculate bin_attribute size through bin_size() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Stop abusing the is_bin_visible() callback to calculate the attribute size. Instead use the new, dedicated bin_size() one. Signed-off-by: Thomas Weißschuh Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-4-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- drivers/nvmem/core.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 33ffa2aa4c11..63370c76394e 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -303,11 +303,19 @@ static umode_t nvmem_bin_attr_is_visible(struct kobject *kobj, struct device *dev = kobj_to_dev(kobj); struct nvmem_device *nvmem = to_nvmem_device(dev); - attr->size = nvmem->size; - return nvmem_bin_attr_get_umode(nvmem); } +static size_t nvmem_bin_attr_size(struct kobject *kobj, + const struct bin_attribute *attr, + int i) +{ + struct device *dev = kobj_to_dev(kobj); + struct nvmem_device *nvmem = to_nvmem_device(dev); + + return nvmem->size; +} + static umode_t nvmem_attr_is_visible(struct kobject *kobj, struct attribute *attr, int i) { @@ -383,6 +391,7 @@ static const struct attribute_group nvmem_bin_group = { .bin_attrs = nvmem_bin_attributes, .attrs = nvmem_attrs, .is_bin_visible = nvmem_bin_attr_is_visible, + .bin_size = nvmem_bin_attr_size, .is_visible = nvmem_attr_is_visible, }; From b626816fdd7f9beb841856ba049396cff46e99aa Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:34 +0000 Subject: [PATCH 15/35] sysfs: treewide: constify attribute callback of bin_is_visible() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The is_bin_visible() callbacks should not modify the struct bin_attribute passed as argument. Enforce this by marking the argument as const. As there are not many callback implementers perform this change throughout the tree at once. Signed-off-by: Thomas Weißschuh Acked-by: Martin K. Petersen Acked-by: Jason Gunthorpe Acked-by: Ira Weiny Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-5-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- drivers/cxl/port.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 2 +- drivers/infiniband/hw/qib/qib_sysfs.c | 2 +- drivers/mtd/spi-nor/sysfs.c | 2 +- drivers/nvmem/core.c | 3 ++- drivers/pci/pci-sysfs.c | 2 +- drivers/pci/vpd.c | 2 +- drivers/platform/x86/amd/hsmp.c | 2 +- drivers/platform/x86/intel/sdsi.c | 2 +- drivers/scsi/scsi_sysfs.c | 2 +- drivers/usb/core/sysfs.c | 2 +- include/linux/sysfs.h | 30 ++++++++++++------------- 12 files changed, 27 insertions(+), 26 deletions(-) diff --git a/drivers/cxl/port.c b/drivers/cxl/port.c index 9dc394295e1f..24041cf85cfb 100644 --- a/drivers/cxl/port.c +++ b/drivers/cxl/port.c @@ -173,7 +173,7 @@ static ssize_t CDAT_read(struct file *filp, struct kobject *kobj, static BIN_ATTR_ADMIN_RO(CDAT, 0); static umode_t cxl_port_bin_attr_is_visible(struct kobject *kobj, - struct bin_attribute *attr, int i) + const struct bin_attribute *attr, int i) { struct device *dev = kobj_to_dev(kobj); struct cxl_port *port = to_cxl_port(dev); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c index 0b28b2cf1517..c1c329eb920b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c @@ -3999,7 +3999,7 @@ static umode_t amdgpu_flash_attr_is_visible(struct kobject *kobj, struct attribu } static umode_t amdgpu_bin_flash_attr_is_visible(struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, int idx) { struct device *dev = kobj_to_dev(kobj); diff --git a/drivers/infiniband/hw/qib/qib_sysfs.c b/drivers/infiniband/hw/qib/qib_sysfs.c index 53ec7510e4eb..ba2cd68b53e6 100644 --- a/drivers/infiniband/hw/qib/qib_sysfs.c +++ b/drivers/infiniband/hw/qib/qib_sysfs.c @@ -283,7 +283,7 @@ static struct bin_attribute *port_ccmgta_attributes[] = { }; static umode_t qib_ccmgta_is_bin_visible(struct kobject *kobj, - struct bin_attribute *attr, int n) + const struct bin_attribute *attr, int n) { struct qib_pportdata *ppd = qib_get_pportdata_kobj(kobj); diff --git a/drivers/mtd/spi-nor/sysfs.c b/drivers/mtd/spi-nor/sysfs.c index 96064e4babf0..5e9eb268073d 100644 --- a/drivers/mtd/spi-nor/sysfs.c +++ b/drivers/mtd/spi-nor/sysfs.c @@ -87,7 +87,7 @@ static umode_t spi_nor_sysfs_is_visible(struct kobject *kobj, } static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj, - struct bin_attribute *attr, int n) + const struct bin_attribute *attr, int n) { struct spi_device *spi = to_spi_device(kobj_to_dev(kobj)); struct spi_mem *spimem = spi_get_drvdata(spi); diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 63370c76394e..73e44d724f90 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -298,7 +298,8 @@ static umode_t nvmem_bin_attr_get_umode(struct nvmem_device *nvmem) } static umode_t nvmem_bin_attr_is_visible(struct kobject *kobj, - struct bin_attribute *attr, int i) + const struct bin_attribute *attr, + int i) { struct device *dev = kobj_to_dev(kobj); struct nvmem_device *nvmem = to_nvmem_device(dev); diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 040f01b2b999..13912940ed2b 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1326,7 +1326,7 @@ static struct bin_attribute *pci_dev_rom_attrs[] = { }; static umode_t pci_dev_rom_attr_is_visible(struct kobject *kobj, - struct bin_attribute *a, int n) + const struct bin_attribute *a, int n) { struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c index e4300f5f304f..a469bcbc0da7 100644 --- a/drivers/pci/vpd.c +++ b/drivers/pci/vpd.c @@ -325,7 +325,7 @@ static struct bin_attribute *vpd_attrs[] = { }; static umode_t vpd_attr_is_visible(struct kobject *kobj, - struct bin_attribute *a, int n) + const struct bin_attribute *a, int n) { struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); diff --git a/drivers/platform/x86/amd/hsmp.c b/drivers/platform/x86/amd/hsmp.c index 8fcf38eed7f0..8f00850c139f 100644 --- a/drivers/platform/x86/amd/hsmp.c +++ b/drivers/platform/x86/amd/hsmp.c @@ -620,7 +620,7 @@ static int hsmp_get_tbl_dram_base(u16 sock_ind) } static umode_t hsmp_is_sock_attr_visible(struct kobject *kobj, - struct bin_attribute *battr, int id) + const struct bin_attribute *battr, int id) { if (plat_dev.proto_ver == HSMP_PROTO_VER6) return battr->attr.mode; diff --git a/drivers/platform/x86/intel/sdsi.c b/drivers/platform/x86/intel/sdsi.c index 9d137621f0e6..33f33b1070fd 100644 --- a/drivers/platform/x86/intel/sdsi.c +++ b/drivers/platform/x86/intel/sdsi.c @@ -541,7 +541,7 @@ static struct bin_attribute *sdsi_bin_attrs[] = { }; static umode_t -sdsi_battr_is_visible(struct kobject *kobj, struct bin_attribute *attr, int n) +sdsi_battr_is_visible(struct kobject *kobj, const struct bin_attribute *attr, int n) { struct device *dev = kobj_to_dev(kobj); struct sdsi_priv *priv = dev_get_drvdata(dev); diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 32f94db6d6bf..f3a1ecb42128 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -1274,7 +1274,7 @@ static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, } static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, - struct bin_attribute *attr, int i) + const struct bin_attribute *attr, int i) { struct device *dev = kobj_to_dev(kobj); struct scsi_device *sdev = to_scsi_device(dev); diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 61b6d978892c..b4cba23831ac 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -925,7 +925,7 @@ static struct bin_attribute *dev_bin_attrs[] = { }; static umode_t dev_bin_attrs_are_visible(struct kobject *kobj, - struct bin_attribute *a, int n) + const struct bin_attribute *a, int n) { struct device *dev = kobj_to_dev(kobj); struct usb_device *udev = to_usb_device(dev); diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index 4746cccb9589..d1b22d56198b 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -101,7 +101,7 @@ struct attribute_group { umode_t (*is_visible)(struct kobject *, struct attribute *, int); umode_t (*is_bin_visible)(struct kobject *, - struct bin_attribute *, int); + const struct bin_attribute *, int); size_t (*bin_size)(struct kobject *, const struct bin_attribute *, int); @@ -199,22 +199,22 @@ struct attribute_group { * attributes, the group visibility is determined by the function * specified to is_visible() not is_bin_visible() */ -#define DEFINE_SYSFS_BIN_GROUP_VISIBLE(name) \ - static inline umode_t sysfs_group_visible_##name( \ - struct kobject *kobj, struct bin_attribute *attr, int n) \ - { \ - if (n == 0 && !name##_group_visible(kobj)) \ - return SYSFS_GROUP_INVISIBLE; \ - return name##_attr_visible(kobj, attr, n); \ +#define DEFINE_SYSFS_BIN_GROUP_VISIBLE(name) \ + static inline umode_t sysfs_group_visible_##name( \ + struct kobject *kobj, const struct bin_attribute *attr, int n) \ + { \ + if (n == 0 && !name##_group_visible(kobj)) \ + return SYSFS_GROUP_INVISIBLE; \ + return name##_attr_visible(kobj, attr, n); \ } -#define DEFINE_SIMPLE_SYSFS_BIN_GROUP_VISIBLE(name) \ - static inline umode_t sysfs_group_visible_##name( \ - struct kobject *kobj, struct bin_attribute *a, int n) \ - { \ - if (n == 0 && !name##_group_visible(kobj)) \ - return SYSFS_GROUP_INVISIBLE; \ - return a->mode; \ +#define DEFINE_SIMPLE_SYSFS_BIN_GROUP_VISIBLE(name) \ + static inline umode_t sysfs_group_visible_##name( \ + struct kobject *kobj, const struct bin_attribute *a, int n) \ + { \ + if (n == 0 && !name##_group_visible(kobj)) \ + return SYSFS_GROUP_INVISIBLE; \ + return a->mode; \ } #define SYSFS_GROUP_VISIBLE(fn) sysfs_group_visible_##fn From 94a20fb9af16417ab5fd17bcde3d906926f15ef6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:35 +0000 Subject: [PATCH 16/35] sysfs: treewide: constify attribute callback of bin_attribute::mmap() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The mmap() callbacks should not modify the struct bin_attribute passed as argument. Enforce this by marking the argument as const. As there are not many callback implementers perform this change throughout the tree at once. Signed-off-by: Thomas Weißschuh Acked-by: Andrew Donnellan # ocxl Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-6-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- arch/alpha/kernel/pci-sysfs.c | 6 +++--- drivers/misc/ocxl/sysfs.c | 2 +- drivers/pci/p2pdma.c | 2 +- drivers/pci/pci-sysfs.c | 10 +++++----- drivers/platform/x86/intel/pmt/class.c | 2 +- drivers/uio/uio_hv_generic.c | 2 +- include/linux/sysfs.h | 2 +- 7 files changed, 13 insertions(+), 13 deletions(-) diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c index 5808a66e2a81..3048758304b5 100644 --- a/arch/alpha/kernel/pci-sysfs.c +++ b/arch/alpha/kernel/pci-sysfs.c @@ -64,7 +64,7 @@ static int __pci_mmap_fits(struct pci_dev *pdev, int num, * Return: %0 on success, negative error code otherwise */ static int pci_mmap_resource(struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma, int sparse) { struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); @@ -93,14 +93,14 @@ static int pci_mmap_resource(struct kobject *kobj, } static int pci_mmap_resource_sparse(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { return pci_mmap_resource(kobj, attr, vma, 1); } static int pci_mmap_resource_dense(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { return pci_mmap_resource(kobj, attr, vma, 0); diff --git a/drivers/misc/ocxl/sysfs.c b/drivers/misc/ocxl/sysfs.c index 405180d47d9b..07520d6e6dc5 100644 --- a/drivers/misc/ocxl/sysfs.c +++ b/drivers/misc/ocxl/sysfs.c @@ -125,7 +125,7 @@ static const struct vm_operations_struct global_mmio_vmops = { }; static int global_mmio_mmap(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, + const struct bin_attribute *bin_attr, struct vm_area_struct *vma) { struct ocxl_afu *afu = to_afu(kobj_to_dev(kobj)); diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c index 4f47a13cb500..7abd4f546d3c 100644 --- a/drivers/pci/p2pdma.c +++ b/drivers/pci/p2pdma.c @@ -90,7 +90,7 @@ static ssize_t published_show(struct device *dev, struct device_attribute *attr, static DEVICE_ATTR_RO(published); static int p2pmem_alloc_mmap(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, struct vm_area_struct *vma) + const struct bin_attribute *attr, struct vm_area_struct *vma) { struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); size_t len = vma->vm_end - vma->vm_start; diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 13912940ed2b..0ad3427228b1 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -910,7 +910,7 @@ static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj, * memory space. */ static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); @@ -930,7 +930,7 @@ static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, * memory space. Returns -ENOSYS if the operation isn't supported */ static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); @@ -1034,7 +1034,7 @@ void pci_remove_legacy_files(struct pci_bus *b) * * Use the regular PCI mapping routines to map a PCI resource into userspace. */ -static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, +static int pci_mmap_resource(struct kobject *kobj, const struct bin_attribute *attr, struct vm_area_struct *vma, int write_combine) { struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); @@ -1059,14 +1059,14 @@ static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, } static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { return pci_mmap_resource(kobj, attr, vma, 0); } static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { return pci_mmap_resource(kobj, attr, vma, 1); diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c index c04bb7f97a4d..f9afa23e754b 100644 --- a/drivers/platform/x86/intel/pmt/class.c +++ b/drivers/platform/x86/intel/pmt/class.c @@ -103,7 +103,7 @@ intel_pmt_read(struct file *filp, struct kobject *kobj, static int intel_pmt_mmap(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, struct vm_area_struct *vma) + const struct bin_attribute *attr, struct vm_area_struct *vma) { struct intel_pmt_entry *entry = container_of(attr, struct intel_pmt_entry, diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index 870409599411..3976360d0096 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -135,7 +135,7 @@ static void hv_uio_rescind(struct vmbus_channel *channel) * The ring buffer is allocated as contiguous memory by vmbus_open */ static int hv_uio_ring_mmap(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { struct vmbus_channel *channel diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index d1b22d56198b..9fcdc8cd3118 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -309,7 +309,7 @@ struct bin_attribute { char *, loff_t, size_t); loff_t (*llseek)(struct file *, struct kobject *, struct bin_attribute *, loff_t, int); - int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr, + int (*mmap)(struct file *, struct kobject *, const struct bin_attribute *attr, struct vm_area_struct *vma); }; From 699e7b85afb5d94b99b0a3edca7e9e93ea320c8f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:36 +0000 Subject: [PATCH 17/35] sysfs: treewide: constify attribute callback of bin_attribute::llseek() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The llseek() callbacks should not modify the struct bin_attribute passed as argument. Enforce this by marking the argument as const. As there are not many callback implementers perform this change throughout the tree at once. Signed-off-by: Thomas Weißschuh Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-7-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pci-sysfs.c | 2 +- include/linux/sysfs.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 0ad3427228b1..49bee70f7d37 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -841,7 +841,7 @@ static const struct attribute_group pci_dev_config_attr_group = { static __maybe_unused loff_t pci_llseek_resource(struct file *filep, struct kobject *kobj __always_unused, - struct bin_attribute *attr, + const struct bin_attribute *attr, loff_t offset, int whence) { return fixed_size_llseek(filep, offset, whence, attr->size); diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index 9fcdc8cd3118..cb2a5e277c23 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -307,7 +307,7 @@ struct bin_attribute { char *, loff_t, size_t); ssize_t (*write)(struct file *, struct kobject *, struct bin_attribute *, char *, loff_t, size_t); - loff_t (*llseek)(struct file *, struct kobject *, struct bin_attribute *, + loff_t (*llseek)(struct file *, struct kobject *, const struct bin_attribute *, loff_t, int); int (*mmap)(struct file *, struct kobject *, const struct bin_attribute *attr, struct vm_area_struct *vma); From ae587a509903cca138e910445d8c21fe73b45c80 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:37 +0000 Subject: [PATCH 18/35] sysfs: implement all BIN_ATTR_* macros in terms of __BIN_ATTR() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The preparations for the upcoming constification of struct bin_attribute requires some logic in the structure definition macros. To avoid duplication of that logic in multiple macros, reimplement all other macros in terms of __BIN_ATTR(). Signed-off-by: Thomas Weißschuh Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-8-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- include/linux/sysfs.h | 27 ++++++++------------------- 1 file changed, 8 insertions(+), 19 deletions(-) diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index cb2a5e277c23..d17c473c1ef2 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -333,17 +333,11 @@ struct bin_attribute { .size = _size, \ } -#define __BIN_ATTR_RO(_name, _size) { \ - .attr = { .name = __stringify(_name), .mode = 0444 }, \ - .read = _name##_read, \ - .size = _size, \ -} +#define __BIN_ATTR_RO(_name, _size) \ + __BIN_ATTR(_name, 0444, _name##_read, NULL, _size) -#define __BIN_ATTR_WO(_name, _size) { \ - .attr = { .name = __stringify(_name), .mode = 0200 }, \ - .write = _name##_write, \ - .size = _size, \ -} +#define __BIN_ATTR_WO(_name, _size) \ + __BIN_ATTR(_name, 0200, NULL, _name##_write, _size) #define __BIN_ATTR_RW(_name, _size) \ __BIN_ATTR(_name, 0644, _name##_read, _name##_write, _size) @@ -364,11 +358,8 @@ struct bin_attribute bin_attr_##_name = __BIN_ATTR_WO(_name, _size) struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size) -#define __BIN_ATTR_ADMIN_RO(_name, _size) { \ - .attr = { .name = __stringify(_name), .mode = 0400 }, \ - .read = _name##_read, \ - .size = _size, \ -} +#define __BIN_ATTR_ADMIN_RO(_name, _size) \ + __BIN_ATTR(_name, 0400, _name##_read, NULL, _size) #define __BIN_ATTR_ADMIN_RW(_name, _size) \ __BIN_ATTR(_name, 0600, _name##_read, _name##_write, _size) @@ -379,10 +370,8 @@ struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RO(_name, _size) #define BIN_ATTR_ADMIN_RW(_name, _size) \ struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RW(_name, _size) -#define __BIN_ATTR_SIMPLE_RO(_name, _mode) { \ - .attr = { .name = __stringify(_name), .mode = _mode }, \ - .read = sysfs_bin_attr_simple_read, \ -} +#define __BIN_ATTR_SIMPLE_RO(_name, _mode) \ + __BIN_ATTR(_name, _mode, sysfs_bin_attr_simple_read, NULL, 0) #define BIN_ATTR_SIMPLE_RO(_name) \ struct bin_attribute bin_attr_##_name = __BIN_ATTR_SIMPLE_RO(_name, 0444) From eb2e6c3a8d66ff37b2ee26cd32334ae0e05fd596 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:38 +0000 Subject: [PATCH 19/35] sysfs: bin_attribute: add const read/write callback variants MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit To make it possible to put struct bin_attribute into read-only memory, the sysfs core has to stop passing mutable pointers to the read() and write() callbacks. As there are numerous implementors of these callbacks throughout the tree it's not possible to change all of them at once. To enable a step-by-step transition, add new variants of the read() and write() callbacks which differ only in the constness of the struct bin_attribute argument. As most binary attributes are defined through macros, extend these macros to transparently handle both variants of callbacks to minimize the churn during the transition. As soon as all handlers are switch to the const variant, the non-const one can be removed together with the transition machinery. Signed-off-by: Thomas Weißschuh Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-9-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/file.c | 22 +++++++++++++++++----- include/linux/sysfs.h | 25 +++++++++++++++++++++++-- 2 files changed, 40 insertions(+), 7 deletions(-) diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 6d39696b4306..785408861c01 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -91,9 +91,12 @@ static ssize_t sysfs_kf_bin_read(struct kernfs_open_file *of, char *buf, count = size - pos; } - if (!battr->read) + if (!battr->read && !battr->read_new) return -EIO; + if (battr->read_new) + return battr->read_new(of->file, kobj, battr, buf, pos, count); + return battr->read(of->file, kobj, battr, buf, pos, count); } @@ -152,9 +155,12 @@ static ssize_t sysfs_kf_bin_write(struct kernfs_open_file *of, char *buf, if (!count) return 0; - if (!battr->write) + if (!battr->write && !battr->write_new) return -EIO; + if (battr->write_new) + return battr->write_new(of->file, kobj, battr, buf, pos, count); + return battr->write(of->file, kobj, battr, buf, pos, count); } @@ -323,13 +329,19 @@ int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent, const struct kernfs_ops *ops; struct kernfs_node *kn; + if (battr->read && battr->read_new) + return -EINVAL; + + if (battr->write && battr->write_new) + return -EINVAL; + if (battr->mmap) ops = &sysfs_bin_kfops_mmap; - else if (battr->read && battr->write) + else if ((battr->read || battr->read_new) && (battr->write || battr->write_new)) ops = &sysfs_bin_kfops_rw; - else if (battr->read) + else if (battr->read || battr->read_new) ops = &sysfs_bin_kfops_ro; - else if (battr->write) + else if (battr->write || battr->write_new) ops = &sysfs_bin_kfops_wo; else ops = &sysfs_file_kfops_empty; diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index d17c473c1ef2..d713a6445a62 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -305,8 +305,12 @@ struct bin_attribute { struct address_space *(*f_mapping)(void); ssize_t (*read)(struct file *, struct kobject *, struct bin_attribute *, char *, loff_t, size_t); + ssize_t (*read_new)(struct file *, struct kobject *, const struct bin_attribute *, + char *, loff_t, size_t); ssize_t (*write)(struct file *, struct kobject *, struct bin_attribute *, char *, loff_t, size_t); + ssize_t (*write_new)(struct file *, struct kobject *, + const struct bin_attribute *, char *, loff_t, size_t); loff_t (*llseek)(struct file *, struct kobject *, const struct bin_attribute *, loff_t, int); int (*mmap)(struct file *, struct kobject *, const struct bin_attribute *attr, @@ -325,11 +329,28 @@ struct bin_attribute { */ #define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr) +typedef ssize_t __sysfs_bin_rw_handler_new(struct file *, struct kobject *, + const struct bin_attribute *, char *, loff_t, size_t); + /* macros to create static binary attributes easier */ #define __BIN_ATTR(_name, _mode, _read, _write, _size) { \ .attr = { .name = __stringify(_name), .mode = _mode }, \ - .read = _read, \ - .write = _write, \ + .read = _Generic(_read, \ + __sysfs_bin_rw_handler_new * : NULL, \ + default : _read \ + ), \ + .read_new = _Generic(_read, \ + __sysfs_bin_rw_handler_new * : _read, \ + default : NULL \ + ), \ + .write = _Generic(_write, \ + __sysfs_bin_rw_handler_new * : NULL, \ + default : _write \ + ), \ + .write_new = _Generic(_write, \ + __sysfs_bin_rw_handler_new * : _write, \ + default : NULL \ + ), \ .size = _size, \ } From 562e932a077cb35173d8dc11e5005f9c5acd22f0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 3 Nov 2024 17:03:39 +0000 Subject: [PATCH 20/35] driver core: Constify attribute arguments of binary attributes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit As preparation for the constification of struct bin_attribute, constify the arguments of the read and write callbacks. Signed-off-by: Thomas Weißschuh Acked-by: Krzysztof Wilczyński Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-10-71110628844c@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- drivers/base/node.c | 4 ++-- drivers/base/topology.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index eb72580288e6..3e761633ac75 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -27,7 +27,7 @@ static const struct bus_type node_subsys = { }; static inline ssize_t cpumap_read(struct file *file, struct kobject *kobj, - struct bin_attribute *attr, char *buf, + const struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct device *dev = kobj_to_dev(kobj); @@ -48,7 +48,7 @@ static inline ssize_t cpumap_read(struct file *file, struct kobject *kobj, static BIN_ATTR_RO(cpumap, CPUMAP_FILE_MAX_BYTES); static inline ssize_t cpulist_read(struct file *file, struct kobject *kobj, - struct bin_attribute *attr, char *buf, + const struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct device *dev = kobj_to_dev(kobj); diff --git a/drivers/base/topology.c b/drivers/base/topology.c index 89f98be5c5b9..1090751d7f45 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -23,7 +23,7 @@ static ssize_t name##_show(struct device *dev, \ #define define_siblings_read_func(name, mask) \ static ssize_t name##_read(struct file *file, struct kobject *kobj, \ - struct bin_attribute *attr, char *buf, \ + const struct bin_attribute *attr, char *buf, \ loff_t off, size_t count) \ { \ struct device *dev = kobj_to_dev(kobj); \ @@ -33,7 +33,7 @@ static ssize_t name##_read(struct file *file, struct kobject *kobj, \ } \ \ static ssize_t name##_list_read(struct file *file, struct kobject *kobj, \ - struct bin_attribute *attr, char *buf, \ + const struct bin_attribute *attr, char *buf, \ loff_t off, size_t count) \ { \ struct device *dev = kobj_to_dev(kobj); \ From bac3b10b78e54b7da3cede397258f75a2180609b Mon Sep 17 00:00:00 2001 From: Saravana Kannan Date: Wed, 30 Oct 2024 10:10:07 -0700 Subject: [PATCH 21/35] driver core: fw_devlink: Stop trying to optimize cycle detection logic In attempting to optimize fw_devlink runtime, I introduced numerous cycle detection bugs by foregoing cycle detection logic under specific conditions. Each fix has further narrowed the conditions for optimization. It's time to give up on these optimization attempts and just run the cycle detection logic every time fw_devlink tries to create a device link. The specific bug report that triggered this fix involved a supplier fwnode that never gets a device created for it. Instead, the supplier fwnode is represented by the device that corresponds to an ancestor fwnode. In this case, fw_devlink didn't do any cycle detection because the cycle detection logic is only run when a device link is created between the devices that correspond to the actual consumer and supplier fwnodes. With this change, fw_devlink will run cycle detection logic even when creating SYNC_STATE_ONLY proxy device links from a device that is an ancestor of a consumer fwnode. Reported-by: Tomi Valkeinen Closes: https://lore.kernel.org/all/1a1ab663-d068-40fb-8c94-f0715403d276@ideasonboard.com/ Fixes: 6442d79d880c ("driver core: fw_devlink: Improve detection of overlapping cycles") Cc: stable Tested-by: Tomi Valkeinen Signed-off-by: Saravana Kannan Link: https://lore.kernel.org/r/20241030171009.1853340-1-saravanak@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/core.c | 55 ++++++++++++++++++++------------------------- 1 file changed, 24 insertions(+), 31 deletions(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index 54b25570a492..633fb4283282 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1989,10 +1989,10 @@ static struct device *fwnode_get_next_parent_dev(const struct fwnode_handle *fwn * * Return true if one or more cycles were found. Otherwise, return false. */ -static bool __fw_devlink_relax_cycles(struct device *con, +static bool __fw_devlink_relax_cycles(struct fwnode_handle *con_handle, struct fwnode_handle *sup_handle) { - struct device *sup_dev = NULL, *par_dev = NULL; + struct device *sup_dev = NULL, *par_dev = NULL, *con_dev = NULL; struct fwnode_link *link; struct device_link *dev_link; bool ret = false; @@ -2009,22 +2009,22 @@ static bool __fw_devlink_relax_cycles(struct device *con, sup_handle->flags |= FWNODE_FLAG_VISITED; - sup_dev = get_dev_from_fwnode(sup_handle); - /* Termination condition. */ - if (sup_dev == con) { + if (sup_handle == con_handle) { pr_debug("----- cycle: start -----\n"); ret = true; goto out; } + sup_dev = get_dev_from_fwnode(sup_handle); + con_dev = get_dev_from_fwnode(con_handle); /* * If sup_dev is bound to a driver and @con hasn't started binding to a * driver, sup_dev can't be a consumer of @con. So, no need to check * further. */ if (sup_dev && sup_dev->links.status == DL_DEV_DRIVER_BOUND && - con->links.status == DL_DEV_NO_DRIVER) { + con_dev && con_dev->links.status == DL_DEV_NO_DRIVER) { ret = false; goto out; } @@ -2033,7 +2033,7 @@ static bool __fw_devlink_relax_cycles(struct device *con, if (link->flags & FWLINK_FLAG_IGNORE) continue; - if (__fw_devlink_relax_cycles(con, link->supplier)) { + if (__fw_devlink_relax_cycles(con_handle, link->supplier)) { __fwnode_link_cycle(link); ret = true; } @@ -2048,7 +2048,7 @@ static bool __fw_devlink_relax_cycles(struct device *con, else par_dev = fwnode_get_next_parent_dev(sup_handle); - if (par_dev && __fw_devlink_relax_cycles(con, par_dev->fwnode)) { + if (par_dev && __fw_devlink_relax_cycles(con_handle, par_dev->fwnode)) { pr_debug("%pfwf: cycle: child of %pfwf\n", sup_handle, par_dev->fwnode); ret = true; @@ -2066,7 +2066,7 @@ static bool __fw_devlink_relax_cycles(struct device *con, !(dev_link->flags & DL_FLAG_CYCLE)) continue; - if (__fw_devlink_relax_cycles(con, + if (__fw_devlink_relax_cycles(con_handle, dev_link->supplier->fwnode)) { pr_debug("%pfwf: cycle: depends on %pfwf\n", sup_handle, dev_link->supplier->fwnode); @@ -2114,11 +2114,6 @@ static int fw_devlink_create_devlink(struct device *con, if (link->flags & FWLINK_FLAG_IGNORE) return 0; - if (con->fwnode == link->consumer) - flags = fw_devlink_get_flags(link->flags); - else - flags = FW_DEVLINK_FLAGS_PERMISSIVE; - /* * In some cases, a device P might also be a supplier to its child node * C. However, this would defer the probe of C until the probe of P @@ -2139,25 +2134,23 @@ static int fw_devlink_create_devlink(struct device *con, return -EINVAL; /* - * SYNC_STATE_ONLY device links don't block probing and supports cycles. - * So, one might expect that cycle detection isn't necessary for them. - * However, if the device link was marked as SYNC_STATE_ONLY because - * it's part of a cycle, then we still need to do cycle detection. This - * is because the consumer and supplier might be part of multiple cycles - * and we need to detect all those cycles. + * Don't try to optimize by not calling the cycle detection logic under + * certain conditions. There's always some corner case that won't get + * detected. */ - if (!device_link_flag_is_sync_state_only(flags) || - flags & DL_FLAG_CYCLE) { - device_links_write_lock(); - if (__fw_devlink_relax_cycles(con, sup_handle)) { - __fwnode_link_cycle(link); - flags = fw_devlink_get_flags(link->flags); - pr_debug("----- cycle: end -----\n"); - dev_info(con, "Fixed dependency cycle(s) with %pfwf\n", - sup_handle); - } - device_links_write_unlock(); + device_links_write_lock(); + if (__fw_devlink_relax_cycles(link->consumer, sup_handle)) { + __fwnode_link_cycle(link); + pr_debug("----- cycle: end -----\n"); + pr_info("%pfwf: Fixed dependency cycle(s) with %pfwf\n", + link->consumer, sup_handle); } + device_links_write_unlock(); + + if (con->fwnode == link->consumer) + flags = fw_devlink_get_flags(link->flags); + else + flags = FW_DEVLINK_FLAGS_PERMISSIVE; if (sup_handle->flags & FWNODE_FLAG_NOT_DEVICE) sup_dev = fwnode_get_next_parent_dev(sup_handle); From fe2e59aa5d7077c5c564d55b7e2997e83710c314 Mon Sep 17 00:00:00 2001 From: Saravana Kannan Date: Wed, 23 Oct 2024 23:13:42 -0700 Subject: [PATCH 22/35] drm: display: Set fwnode for aux bus devices MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit fwnode needs to be set for a device for fw_devlink to be able to track/enforce its dependencies correctly. Without this, you'll see error messages like this when the supplier has probed and tries to make sure all its fwnode consumers are linked to it using device links: mediatek-drm-dp 1c500000.edp-tx: Failed to create device link (0x180) with backlight-lcd0 Reported-by: Nícolas F. R. A. Prado Closes: https://lore.kernel.org/all/7b995947-4540-4b17-872e-e107adca4598@notapiano/ Tested-by: Nícolas F. R. A. Prado Signed-off-by: Saravana Kannan Reviewed-by: Dmitry Baryshkov Reviewed-by: Thierry Reding Tested-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20241024061347.1771063-2-saravanak@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/display/drm_dp_aux_bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/display/drm_dp_aux_bus.c b/drivers/gpu/drm/display/drm_dp_aux_bus.c index d810529ebfb6..ec7eac6b595f 100644 --- a/drivers/gpu/drm/display/drm_dp_aux_bus.c +++ b/drivers/gpu/drm/display/drm_dp_aux_bus.c @@ -292,7 +292,7 @@ int of_dp_aux_populate_bus(struct drm_dp_aux *aux, aux_ep->dev.parent = aux->dev; aux_ep->dev.bus = &dp_aux_bus_type; aux_ep->dev.type = &dp_aux_device_type_type; - aux_ep->dev.of_node = of_node_get(np); + device_set_node(&aux_ep->dev, of_fwnode_handle(of_node_get(np))); dev_set_name(&aux_ep->dev, "aux-%s", dev_name(aux->dev)); ret = device_register(&aux_ep->dev); From 74ffe43bad3af3e2a786ca017c205555ba87ebad Mon Sep 17 00:00:00 2001 From: Saravana Kannan Date: Wed, 23 Oct 2024 23:13:43 -0700 Subject: [PATCH 23/35] phy: tegra: xusb: Set fwnode for xusb port devices MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit fwnode needs to be set for a device for fw_devlink to be able to track/enforce its dependencies correctly. Without this, you'll see error messages like this when the supplier has probed and tries to make sure all its fwnode consumers are linked to it using device links: tegra-xusb-padctl 3520000.padctl: Failed to create device link (0x180) with 1-0008 Reported-by: Jon Hunter Closes: https://lore.kernel.org/all/20240910130019.35081-1-jonathanh@nvidia.com/ Tested-by: Jon Hunter Suggested-by: Nícolas F. R. A. Prado Signed-off-by: Saravana Kannan Acked-by: Thierry Reding Link: https://lore.kernel.org/r/20241024061347.1771063-3-saravanak@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/phy/tegra/xusb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c index 342f5ccf611d..d536998288ac 100644 --- a/drivers/phy/tegra/xusb.c +++ b/drivers/phy/tegra/xusb.c @@ -543,7 +543,7 @@ static int tegra_xusb_port_init(struct tegra_xusb_port *port, device_initialize(&port->dev); port->dev.type = &tegra_xusb_port_type; - port->dev.of_node = of_node_get(np); + device_set_node(&port->dev, of_fwnode_handle(of_node_get(np))); port->dev.parent = padctl->dev; err = dev_set_name(&port->dev, "%s-%u", name, index); From 298c2af4788ed027a42c2bab0f210219825fb5fd Mon Sep 17 00:00:00 2001 From: Saravana Kannan Date: Wed, 23 Oct 2024 23:13:44 -0700 Subject: [PATCH 24/35] drivers: core: fw_devlink: Make the error message a bit more useful It would make it easier to debugs issues similar to the ones reported[1][2] recently where some devices didn't have the fwnode set. [1] - https://lore.kernel.org/all/7b995947-4540-4b17-872e-e107adca4598@notapiano/ [2] - https://lore.kernel.org/all/20240910130019.35081-1-jonathanh@nvidia.com/ Signed-off-by: Saravana Kannan Link: https://lore.kernel.org/r/20241024061347.1771063-4-saravanak@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index 633fb4283282..3a870662bb6c 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -2173,8 +2173,8 @@ static int fw_devlink_create_devlink(struct device *con, } if (con != sup_dev && !device_link_add(con, sup_dev, flags)) { - dev_err(con, "Failed to create device link (0x%x) with %s\n", - flags, dev_name(sup_dev)); + dev_err(con, "Failed to create device link (0x%x) with supplier %s for %pfwf\n", + flags, dev_name(sup_dev), link->consumer); ret = -EINVAL; } From 5852357d553829e972eeb575b5b3e39fc573addd Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Thu, 7 Nov 2024 10:07:43 -0700 Subject: [PATCH 25/35] cdx: Fix cdx_mmap_resource() after constifying attr in ->mmap() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit 94a20fb9af16 ("sysfs: treewide: constify attribute callback of bin_attribute::mmap()") missed updating the attr parameter of cdx_mmap_resource(), resulting in a build failure. drivers/cdx/cdx.c: In function 'cdx_create_res_attr': drivers/cdx/cdx.c:773:24: error: assignment to 'int (*)(struct file *, struct kobject *, const struct bin_attribute *, struct vm_area_struct *)' from incompatible pointer type 'int (*)(struct file *, struct kobject *, struct bin_attribute *, struct vm_area_struct *)' [-Wincompatible-pointer-types] 773 | res_attr->mmap = cdx_mmap_resource; | ^ Update cdx_mmap_resource() to match, resolving the build failure. Fixes: 94a20fb9af16 ("sysfs: treewide: constify attribute callback of bin_attribute::mmap()") Signed-off-by: Nathan Chancellor Tested-by: Thorsten Leemhuis Reviewed-by: Thomas Weißschuu Link: https://lore.kernel.org/r/20241107-sysfs-const-mmap-fix-cdx-v1-1-2ed9b7cd5f8b@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/cdx/cdx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c index 07371cb653d3..316bd89a95ca 100644 --- a/drivers/cdx/cdx.c +++ b/drivers/cdx/cdx.c @@ -707,7 +707,7 @@ static const struct vm_operations_struct cdx_phys_vm_ops = { * Return: true on success, false otherwise. */ static int cdx_mmap_resource(struct file *fp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { struct cdx_device *cdx_dev = to_cdx_device(kobj_to_dev(kobj)); From 2d038efcb4b3e3b9a1d117b3c971364926e59082 Mon Sep 17 00:00:00 2001 From: "Rob Herring (Arm)" Date: Mon, 4 Nov 2024 13:03:42 -0600 Subject: [PATCH 26/35] cacheinfo: Use of_property_present() for non-boolean properties The use of of_property_read_bool() for non-boolean properties is deprecated in favor of of_property_present() when testing for property presence. Signed-off-by: Rob Herring (Arm) Link: https://lore.kernel.org/r/20241104190342.270883-1-robh@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/base/cacheinfo.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c index 5344df24fd09..609935ad5091 100644 --- a/drivers/base/cacheinfo.c +++ b/drivers/base/cacheinfo.c @@ -254,11 +254,11 @@ static int of_count_cache_leaves(struct device_node *np) { unsigned int leaves = 0; - if (of_property_read_bool(np, "cache-size")) + if (of_property_present(np, "cache-size")) ++leaves; - if (of_property_read_bool(np, "i-cache-size")) + if (of_property_present(np, "i-cache-size")) ++leaves; - if (of_property_read_bool(np, "d-cache-size")) + if (of_property_present(np, "d-cache-size")) ++leaves; if (!leaves) { From f659e8fb8f075dfcc0bd6800935f78ec021c7f25 Mon Sep 17 00:00:00 2001 From: Zijun Hu Date: Tue, 5 Nov 2024 08:20:23 +0800 Subject: [PATCH 27/35] driver core: class: Correct WARN() message in APIs class_(for_each|find)_device() For both API class_for_each_device(const struct class *class, ...) and class_find_device(const struct class *class, ...), their WARN() messages prompt @class was not initialized when suffer class_to_subsys(@class) error, but the error actually means @class was not registered, so these warning messages are not accurate. Fix by replacing term initialized with registered within these messages. Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/20241105-class_fix-v1-2-80866f9994a5@quicinc.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/class.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/base/class.c b/drivers/base/class.c index cb5359235c70..582b5a02a5c4 100644 --- a/drivers/base/class.c +++ b/drivers/base/class.c @@ -405,7 +405,7 @@ int class_for_each_device(const struct class *class, const struct device *start, if (!class) return -EINVAL; if (!sp) { - WARN(1, "%s called for class '%s' before it was initialized", + WARN(1, "%s called for class '%s' before it was registered", __func__, class->name); return -EINVAL; } @@ -453,7 +453,7 @@ struct device *class_find_device(const struct class *class, const struct device if (!class) return NULL; if (!sp) { - WARN(1, "%s called for class '%s' before it was initialized", + WARN(1, "%s called for class '%s' before it was registered", __func__, class->name); return NULL; } From f841224f03029225dec70ee1f12ffc2473ed067a Mon Sep 17 00:00:00 2001 From: Amit Vadhavana Date: Mon, 11 Nov 2024 22:22:53 +0530 Subject: [PATCH 28/35] drivers: core: fw_devlink: Fix excess parameter description in docstring Replace the parameter name 'con' with 'con_handle' in the docstring of __fw_devlink_relax_cycles() to resolve the kernel-doc warning about an excess parameter description. Address the following warning: ./drivers/base/core.c:1994: warning: Excess function parameter 'con' description in '__fw_devlink_relax_cycles' Reported-by: Stephen Rothwell Closes: https://lore.kernel.org/all/20241107223528.3781323e@canb.auug.org.au/ Signed-off-by: Amit Vadhavana Link: https://lore.kernel.org/r/20241111165253.16672-1-av2082000@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index 3a870662bb6c..8cd9f535ddcc 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1971,7 +1971,7 @@ static struct device *fwnode_get_next_parent_dev(const struct fwnode_handle *fwn /** * __fw_devlink_relax_cycles - Relax and mark dependency cycles. - * @con: Potential consumer device. + * @con_handle: Potential consumer device fwnode. * @sup_handle: Potential supplier's fwnode. * * Needs to be called with fwnode_lock and device link lock held. From 369a9c046c2fdfe037f05b43b84c386bdbccc103 Mon Sep 17 00:00:00 2001 From: Gaosheng Cui Date: Wed, 16 Oct 2024 19:03:35 +0800 Subject: [PATCH 29/35] firmware_loader: Fix possible resource leak in fw_log_firmware_info() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The alg instance should be released under the exception path, otherwise there may be resource leak here. To mitigate this, free the alg instance with crypto_free_shash when kmalloc fails. Fixes: 02fe26f25325 ("firmware_loader: Add debug message with checksum for FW file") Signed-off-by: Gaosheng Cui Reviewed-by: Amadeusz Sławiński Reviewed-by: Russ Weight Link: https://lore.kernel.org/r/20241016110335.3677924-1-cuigaosheng1@huawei.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/firmware_loader/main.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c index bb368193d969..cb0912ea3e62 100644 --- a/drivers/base/firmware_loader/main.c +++ b/drivers/base/firmware_loader/main.c @@ -829,19 +829,18 @@ static void fw_log_firmware_info(const struct firmware *fw, const char *name, st shash->tfm = alg; if (crypto_shash_digest(shash, fw->data, fw->size, sha256buf) < 0) - goto out_shash; + goto out_free; for (int i = 0; i < SHA256_DIGEST_SIZE; i++) sprintf(&outbuf[i * 2], "%02x", sha256buf[i]); outbuf[SHA256_BLOCK_SIZE] = 0; dev_dbg(device, "Loaded FW: %s, sha256: %s\n", name, outbuf); -out_shash: - crypto_free_shash(alg); out_free: kfree(shash); kfree(outbuf); kfree(sha256buf); + crypto_free_shash(alg); } #else static void fw_log_firmware_info(const struct firmware *fw, const char *name, From 906c508afdca3487c4273bfeda8abedc8e21047b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Fri, 15 Nov 2024 17:42:48 +0100 Subject: [PATCH 30/35] sysfs: attribute_group: allow registration of const bin_attribute MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit To be able to constify instances of struct bin_attribute it has to be possible to add them to string attribute_group. The current type of the bin_attrs member however is not compatible with that. Introduce a union that allows registration of both const and non-const attributes to enable a piecewise transition. As both union member types are compatible no logic needs to be adapted. Technically it is now possible register a const struct bin_attribute and receive it as mutable pointer in the callbacks. This is a soundness issue. But this same soundness issue already exists today in sysfs_create_bin_file(). Also the struct definition and callback implementation are always closely linked and are meant to be moved to const in lockstep. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20241115-b4-sysfs-const-bin_attr-group-v1-1-2c9bb12dfc48@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- include/linux/sysfs.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index d713a6445a62..0f2fcd244523 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -106,7 +106,10 @@ struct attribute_group { const struct bin_attribute *, int); struct attribute **attrs; - struct bin_attribute **bin_attrs; + union { + struct bin_attribute **bin_attrs; + const struct bin_attribute *const *bin_attrs_new; + }; }; #define SYSFS_PREALLOC 010000 From 5943c0dc7912210be1ab2732e0b663c1082ab543 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Fri, 15 Nov 2024 17:42:49 +0100 Subject: [PATCH 31/35] driver core: Constify bin_attribute definitions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Mark all 'struct bin_attribute' instances as const to protect against accidental and malicious modifications. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20241115-b4-sysfs-const-bin_attr-group-v1-2-2c9bb12dfc48@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- drivers/base/node.c | 8 ++++---- drivers/base/topology.c | 36 ++++++++++++++++++------------------ 2 files changed, 22 insertions(+), 22 deletions(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index 3e761633ac75..0ea653fa3433 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -45,7 +45,7 @@ static inline ssize_t cpumap_read(struct file *file, struct kobject *kobj, return n; } -static BIN_ATTR_RO(cpumap, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(cpumap, CPUMAP_FILE_MAX_BYTES); static inline ssize_t cpulist_read(struct file *file, struct kobject *kobj, const struct bin_attribute *attr, char *buf, @@ -66,7 +66,7 @@ static inline ssize_t cpulist_read(struct file *file, struct kobject *kobj, return n; } -static BIN_ATTR_RO(cpulist, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(cpulist, CPULIST_FILE_MAX_BYTES); /** * struct node_access_nodes - Access class device to hold user visible @@ -578,7 +578,7 @@ static struct attribute *node_dev_attrs[] = { NULL }; -static struct bin_attribute *node_dev_bin_attrs[] = { +static const struct bin_attribute *node_dev_bin_attrs[] = { &bin_attr_cpumap, &bin_attr_cpulist, NULL @@ -586,7 +586,7 @@ static struct bin_attribute *node_dev_bin_attrs[] = { static const struct attribute_group node_dev_group = { .attrs = node_dev_attrs, - .bin_attrs = node_dev_bin_attrs + .bin_attrs_new = node_dev_bin_attrs, }; static const struct attribute_group *node_dev_groups[] = { diff --git a/drivers/base/topology.c b/drivers/base/topology.c index 1090751d7f45..cf160dd2c27b 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -62,50 +62,50 @@ define_id_show_func(ppin, "0x%llx"); static DEVICE_ATTR_ADMIN_RO(ppin); define_siblings_read_func(thread_siblings, sibling_cpumask); -static BIN_ATTR_RO(thread_siblings, CPUMAP_FILE_MAX_BYTES); -static BIN_ATTR_RO(thread_siblings_list, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(thread_siblings, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(thread_siblings_list, CPULIST_FILE_MAX_BYTES); define_siblings_read_func(core_cpus, sibling_cpumask); -static BIN_ATTR_RO(core_cpus, CPUMAP_FILE_MAX_BYTES); -static BIN_ATTR_RO(core_cpus_list, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(core_cpus, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(core_cpus_list, CPULIST_FILE_MAX_BYTES); define_siblings_read_func(core_siblings, core_cpumask); -static BIN_ATTR_RO(core_siblings, CPUMAP_FILE_MAX_BYTES); -static BIN_ATTR_RO(core_siblings_list, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(core_siblings, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(core_siblings_list, CPULIST_FILE_MAX_BYTES); #ifdef TOPOLOGY_CLUSTER_SYSFS define_siblings_read_func(cluster_cpus, cluster_cpumask); -static BIN_ATTR_RO(cluster_cpus, CPUMAP_FILE_MAX_BYTES); -static BIN_ATTR_RO(cluster_cpus_list, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(cluster_cpus, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(cluster_cpus_list, CPULIST_FILE_MAX_BYTES); #endif #ifdef TOPOLOGY_DIE_SYSFS define_siblings_read_func(die_cpus, die_cpumask); -static BIN_ATTR_RO(die_cpus, CPUMAP_FILE_MAX_BYTES); -static BIN_ATTR_RO(die_cpus_list, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(die_cpus, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(die_cpus_list, CPULIST_FILE_MAX_BYTES); #endif define_siblings_read_func(package_cpus, core_cpumask); -static BIN_ATTR_RO(package_cpus, CPUMAP_FILE_MAX_BYTES); -static BIN_ATTR_RO(package_cpus_list, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(package_cpus, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(package_cpus_list, CPULIST_FILE_MAX_BYTES); #ifdef TOPOLOGY_BOOK_SYSFS define_id_show_func(book_id, "%d"); static DEVICE_ATTR_RO(book_id); define_siblings_read_func(book_siblings, book_cpumask); -static BIN_ATTR_RO(book_siblings, CPUMAP_FILE_MAX_BYTES); -static BIN_ATTR_RO(book_siblings_list, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(book_siblings, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(book_siblings_list, CPULIST_FILE_MAX_BYTES); #endif #ifdef TOPOLOGY_DRAWER_SYSFS define_id_show_func(drawer_id, "%d"); static DEVICE_ATTR_RO(drawer_id); define_siblings_read_func(drawer_siblings, drawer_cpumask); -static BIN_ATTR_RO(drawer_siblings, CPUMAP_FILE_MAX_BYTES); -static BIN_ATTR_RO(drawer_siblings_list, CPULIST_FILE_MAX_BYTES); +static const BIN_ATTR_RO(drawer_siblings, CPUMAP_FILE_MAX_BYTES); +static const BIN_ATTR_RO(drawer_siblings_list, CPULIST_FILE_MAX_BYTES); #endif -static struct bin_attribute *bin_attrs[] = { +static const struct bin_attribute *const bin_attrs[] = { &bin_attr_core_cpus, &bin_attr_core_cpus_list, &bin_attr_thread_siblings, @@ -163,7 +163,7 @@ static umode_t topology_is_visible(struct kobject *kobj, static const struct attribute_group topology_attr_group = { .attrs = default_attrs, - .bin_attrs = bin_attrs, + .bin_attrs_new = bin_attrs, .is_visible = topology_is_visible, .name = "topology" }; From 573bcbe17e98f2cc4d398a15c8ef32dd685cda85 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Mon, 18 Nov 2024 16:02:47 +0100 Subject: [PATCH 32/35] perf: arm-ni: Remove spurious NULL in attribute_group definition MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This NULL value is most-likely a copy-paste error from an array definition. So far the NULL didn't have any effect. As there will be a union in struct attribute_group at this location, it will trigger a compiler warning. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20241118-sysfs-const-attribute_group-fixes-v1-1-48e0b0ad8cba@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- drivers/perf/arm-ni.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/perf/arm-ni.c b/drivers/perf/arm-ni.c index 90fcfe693439..fd7a5e60e963 100644 --- a/drivers/perf/arm-ni.c +++ b/drivers/perf/arm-ni.c @@ -247,7 +247,6 @@ static struct attribute *arm_ni_other_attrs[] = { static const struct attribute_group arm_ni_other_attr_group = { .attrs = arm_ni_other_attrs, - NULL }; static const struct attribute_group *arm_ni_attr_groups[] = { From b22fd46830c24f5a5833b60f9fac1682afc201ec Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Mon, 18 Nov 2024 16:02:48 +0100 Subject: [PATCH 33/35] s390/con3215: Remove spurious NULL in attribute_group definition MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This NULL value is most-likely a copy-paste error from an array definition. So far the NULL didn't have any effect. As there will be a union in struct attribute_group at this location, it will trigger a compiler warning. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20241118-sysfs-const-attribute_group-fixes-v1-2-48e0b0ad8cba@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- drivers/s390/char/con3215.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c index dcb3c32f027a..c763c50d1454 100644 --- a/drivers/s390/char/con3215.c +++ b/drivers/s390/char/con3215.c @@ -803,7 +803,6 @@ static struct attribute *con3215_drv_attrs[] = { static struct attribute_group con3215_drv_attr_group = { .attrs = con3215_drv_attrs, - NULL, }; static const struct attribute_group *con3215_drv_attr_groups[] = { From e7240bd91f96f925a3bb8d2b9348fcb1db457b10 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Mon, 18 Nov 2024 16:02:49 +0100 Subject: [PATCH 34/35] cpu: Remove spurious NULL in attribute_group definition MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This NULL value is most-likely a copy-paste error from an array definition. The NULL doesn't have any effect. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20241118-sysfs-const-attribute_group-fixes-v1-3-48e0b0ad8cba@weissschuh.net Signed-off-by: Greg Kroah-Hartman --- kernel/cpu.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/kernel/cpu.c b/kernel/cpu.c index d293d52a3e00..f3ee615d2274 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -2866,7 +2866,6 @@ static struct attribute *cpuhp_cpu_attrs[] = { static const struct attribute_group cpuhp_cpu_attr_group = { .attrs = cpuhp_cpu_attrs, .name = "hotplug", - NULL }; static ssize_t states_show(struct device *dev, @@ -2898,7 +2897,6 @@ static struct attribute *cpuhp_cpu_root_attrs[] = { static const struct attribute_group cpuhp_cpu_root_attr_group = { .attrs = cpuhp_cpu_root_attrs, .name = "hotplug", - NULL }; #ifdef CONFIG_HOTPLUG_SMT @@ -3020,7 +3018,6 @@ static struct attribute *cpuhp_smt_attrs[] = { static const struct attribute_group cpuhp_smt_attr_group = { .attrs = cpuhp_smt_attrs, .name = "smt", - NULL }; static int __init cpu_smt_sysfs_init(void) From acfeb6defcb9310b1ff44db1e633798ba766337d Mon Sep 17 00:00:00 2001 From: David Wang <00107082@163.com> Date: Wed, 20 Nov 2024 13:30:55 +0800 Subject: [PATCH 35/35] Fix a potential abuse of seq_printf() format string in drivers Using device name as format string of seq_printf() is proned to "Format string attack", opens possibility for exploitation. Seq_puts() is safer and more efficient. Signed-off-by: David Wang <00107082@163.com> Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/20241120053055.225195-1-00107082@163.com Signed-off-by: Greg Kroah-Hartman --- drivers/gpio/gpio-aspeed-sgpio.c | 2 +- drivers/gpio/gpio-aspeed.c | 2 +- drivers/gpio/gpio-ep93xx.c | 2 +- drivers/gpio/gpio-hlwd.c | 2 +- drivers/gpio/gpio-mlxbf2.c | 2 +- drivers/gpio/gpio-omap.c | 2 +- drivers/gpio/gpio-pca953x.c | 2 +- drivers/gpio/gpio-pl061.c | 2 +- drivers/gpio/gpio-tegra.c | 2 +- drivers/gpio/gpio-tegra186.c | 2 +- drivers/gpio/gpio-tqmx86.c | 2 +- drivers/gpio/gpio-visconti.c | 2 +- drivers/gpio/gpio-xgs-iproc.c | 2 +- drivers/irqchip/irq-gic.c | 2 +- drivers/irqchip/irq-mvebu-pic.c | 2 +- drivers/irqchip/irq-versatile-fpga.c | 2 +- drivers/pinctrl/bcm/pinctrl-iproc-gpio.c | 2 +- drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 2 +- drivers/pinctrl/pinctrl-mcp23s08.c | 2 +- drivers/pinctrl/pinctrl-stmfx.c | 2 +- drivers/pinctrl/pinctrl-sx150x.c | 2 +- drivers/pinctrl/renesas/pinctrl-rzg2l.c | 2 +- 22 files changed, 22 insertions(+), 22 deletions(-) diff --git a/drivers/gpio/gpio-aspeed-sgpio.c b/drivers/gpio/gpio-aspeed-sgpio.c index 72755fee6478..34eb26298e32 100644 --- a/drivers/gpio/gpio-aspeed-sgpio.c +++ b/drivers/gpio/gpio-aspeed-sgpio.c @@ -420,7 +420,7 @@ static void aspeed_sgpio_irq_print_chip(struct irq_data *d, struct seq_file *p) int offset; irqd_to_aspeed_sgpio_data(d, &gpio, &bank, &bit, &offset); - seq_printf(p, dev_name(gpio->dev)); + seq_puts(p, dev_name(gpio->dev)); } static const struct irq_chip aspeed_sgpio_irq_chip = { diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c index ea40ad43a79b..7f3292d9f016 100644 --- a/drivers/gpio/gpio-aspeed.c +++ b/drivers/gpio/gpio-aspeed.c @@ -1102,7 +1102,7 @@ static void aspeed_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p) if (rc) return; - seq_printf(p, dev_name(gpio->dev)); + seq_puts(p, dev_name(gpio->dev)); } static const struct irq_chip aspeed_gpio_irq_chip = { diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c index ab798c848215..58d2464c07bc 100644 --- a/drivers/gpio/gpio-ep93xx.c +++ b/drivers/gpio/gpio-ep93xx.c @@ -249,7 +249,7 @@ static void ep93xx_irq_print_chip(struct irq_data *data, struct seq_file *p) { struct gpio_chip *gc = irq_data_get_irq_chip_data(data); - seq_printf(p, dev_name(gc->parent)); + seq_puts(p, dev_name(gc->parent)); } static const struct irq_chip gpio_eic_irq_chip = { diff --git a/drivers/gpio/gpio-hlwd.c b/drivers/gpio/gpio-hlwd.c index 1bcfc1835dae..0580f6712bea 100644 --- a/drivers/gpio/gpio-hlwd.c +++ b/drivers/gpio/gpio-hlwd.c @@ -210,7 +210,7 @@ static void hlwd_gpio_irq_print_chip(struct irq_data *data, struct seq_file *p) struct hlwd_gpio *hlwd = gpiochip_get_data(irq_data_get_irq_chip_data(data)); - seq_printf(p, dev_name(hlwd->dev)); + seq_puts(p, dev_name(hlwd->dev)); } static const struct irq_chip hlwd_gpio_irq_chip = { diff --git a/drivers/gpio/gpio-mlxbf2.c b/drivers/gpio/gpio-mlxbf2.c index 6abe01bc39c3..6f3dda6b635f 100644 --- a/drivers/gpio/gpio-mlxbf2.c +++ b/drivers/gpio/gpio-mlxbf2.c @@ -331,7 +331,7 @@ static void mlxbf2_gpio_irq_print_chip(struct irq_data *irqd, struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd); struct mlxbf2_gpio_context *gs = gpiochip_get_data(gc); - seq_printf(p, dev_name(gs->dev)); + seq_puts(p, dev_name(gs->dev)); } static const struct irq_chip mlxbf2_gpio_irq_chip = { diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 76d5d87e9681..279524b640ae 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -715,7 +715,7 @@ static void omap_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p) { struct gpio_bank *bank = omap_irq_data_get_bank(d); - seq_printf(p, dev_name(bank->dev)); + seq_puts(p, dev_name(bank->dev)); } static const struct irq_chip omap_gpio_irq_chip = { diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index 3f2d33ee20cc..272febc3230e 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -815,7 +815,7 @@ static void pca953x_irq_print_chip(struct irq_data *data, struct seq_file *p) { struct gpio_chip *gc = irq_data_get_irq_chip_data(data); - seq_printf(p, dev_name(gc->parent)); + seq_puts(p, dev_name(gc->parent)); } static const struct irq_chip pca953x_irq_chip = { diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c index a211a02d4b4a..1c273727ffa3 100644 --- a/drivers/gpio/gpio-pl061.c +++ b/drivers/gpio/gpio-pl061.c @@ -291,7 +291,7 @@ static void pl061_irq_print_chip(struct irq_data *data, struct seq_file *p) { struct gpio_chip *gc = irq_data_get_irq_chip_data(data); - seq_printf(p, dev_name(gc->parent)); + seq_puts(p, dev_name(gc->parent)); } static const struct irq_chip pl061_irq_chip = { diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index 6d3a39a03f58..9ad286adf263 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -600,7 +600,7 @@ static void tegra_gpio_irq_print_chip(struct irq_data *d, struct seq_file *s) { struct gpio_chip *chip = irq_data_get_irq_chip_data(d); - seq_printf(s, dev_name(chip->parent)); + seq_puts(s, dev_name(chip->parent)); } static const struct irq_chip tegra_gpio_irq_chip = { diff --git a/drivers/gpio/gpio-tegra186.c b/drivers/gpio/gpio-tegra186.c index 1ecb733a5e88..6895b65c86af 100644 --- a/drivers/gpio/gpio-tegra186.c +++ b/drivers/gpio/gpio-tegra186.c @@ -610,7 +610,7 @@ static void tegra186_irq_print_chip(struct irq_data *data, struct seq_file *p) { struct gpio_chip *gc = irq_data_get_irq_chip_data(data); - seq_printf(p, dev_name(gc->parent)); + seq_puts(p, dev_name(gc->parent)); } static const struct irq_chip tegra186_gpio_irq_chip = { diff --git a/drivers/gpio/gpio-tqmx86.c b/drivers/gpio/gpio-tqmx86.c index f2e7e8754d95..5e26eb3adabb 100644 --- a/drivers/gpio/gpio-tqmx86.c +++ b/drivers/gpio/gpio-tqmx86.c @@ -275,7 +275,7 @@ static void tqmx86_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); - seq_printf(p, gc->label); + seq_puts(p, gc->label); } static const struct irq_chip tqmx86_gpio_irq_chip = { diff --git a/drivers/gpio/gpio-visconti.c b/drivers/gpio/gpio-visconti.c index ebc71ecdb6cf..5bd965c18a46 100644 --- a/drivers/gpio/gpio-visconti.c +++ b/drivers/gpio/gpio-visconti.c @@ -142,7 +142,7 @@ static void visconti_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p) struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct visconti_gpio *priv = gpiochip_get_data(gc); - seq_printf(p, dev_name(priv->dev)); + seq_puts(p, dev_name(priv->dev)); } static const struct irq_chip visconti_gpio_irq_chip = { diff --git a/drivers/gpio/gpio-xgs-iproc.c b/drivers/gpio/gpio-xgs-iproc.c index d445eea03687..e9390f136b3c 100644 --- a/drivers/gpio/gpio-xgs-iproc.c +++ b/drivers/gpio/gpio-xgs-iproc.c @@ -198,7 +198,7 @@ static void iproc_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p) struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct iproc_gpio_chip *chip = to_iproc_gpio(gc); - seq_printf(p, dev_name(chip->dev)); + seq_puts(p, dev_name(chip->dev)); } static const struct irq_chip iproc_gpio_irq_chip = { diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 3be7bd8cd8cd..8fae6dc01024 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -400,7 +400,7 @@ static void gic_irq_print_chip(struct irq_data *d, struct seq_file *p) struct gic_chip_data *gic = irq_data_get_irq_chip_data(d); if (gic->domain->pm_dev) - seq_printf(p, gic->domain->pm_dev->of_node->name); + seq_puts(p, gic->domain->pm_dev->of_node->name); else seq_printf(p, "GIC-%d", (int)(gic - &gic_data[0])); } diff --git a/drivers/irqchip/irq-mvebu-pic.c b/drivers/irqchip/irq-mvebu-pic.c index 08b0cc862adf..b815a60f930c 100644 --- a/drivers/irqchip/irq-mvebu-pic.c +++ b/drivers/irqchip/irq-mvebu-pic.c @@ -71,7 +71,7 @@ static void mvebu_pic_print_chip(struct irq_data *d, struct seq_file *p) { struct mvebu_pic *pic = irq_data_get_irq_chip_data(d); - seq_printf(p, dev_name(&pic->pdev->dev)); + seq_puts(p, dev_name(&pic->pdev->dev)); } static const struct irq_chip mvebu_pic_chip = { diff --git a/drivers/irqchip/irq-versatile-fpga.c b/drivers/irqchip/irq-versatile-fpga.c index ca471c6fee99..0abc8934c2ee 100644 --- a/drivers/irqchip/irq-versatile-fpga.c +++ b/drivers/irqchip/irq-versatile-fpga.c @@ -69,7 +69,7 @@ static void fpga_irq_print_chip(struct irq_data *d, struct seq_file *p) { struct fpga_irq_data *f = irq_data_get_irq_chip_data(d); - seq_printf(p, irq_domain_get_of_node(f->domain)->name); + seq_puts(p, irq_domain_get_of_node(f->domain)->name); } static const struct irq_chip fpga_chip = { diff --git a/drivers/pinctrl/bcm/pinctrl-iproc-gpio.c b/drivers/pinctrl/bcm/pinctrl-iproc-gpio.c index fd5ce52d05b1..c9a3d3aa8c10 100644 --- a/drivers/pinctrl/bcm/pinctrl-iproc-gpio.c +++ b/drivers/pinctrl/bcm/pinctrl-iproc-gpio.c @@ -309,7 +309,7 @@ static void iproc_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p) struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct iproc_gpio *chip = gpiochip_get_data(gc); - seq_printf(p, dev_name(chip->dev)); + seq_puts(p, dev_name(chip->dev)); } static const struct irq_chip iproc_gpio_irq_chip = { diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c index 4c4ada06423d..335744ac8310 100644 --- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c +++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c @@ -734,7 +734,7 @@ static void armada_37xx_irq_print_chip(struct irq_data *d, struct seq_file *p) struct gpio_chip *chip = irq_data_get_irq_chip_data(d); struct armada_37xx_pinctrl *info = gpiochip_get_data(chip); - seq_printf(p, info->data->name); + seq_puts(p, info->data->name); } static const struct irq_chip armada_37xx_irqchip = { diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c index 737d0ae3d0b6..d66c3a3e8429 100644 --- a/drivers/pinctrl/pinctrl-mcp23s08.c +++ b/drivers/pinctrl/pinctrl-mcp23s08.c @@ -569,7 +569,7 @@ static void mcp23s08_irq_print_chip(struct irq_data *d, struct seq_file *p) struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct mcp23s08 *mcp = gpiochip_get_data(gc); - seq_printf(p, dev_name(mcp->dev)); + seq_puts(p, dev_name(mcp->dev)); } static const struct irq_chip mcp23s08_irq_chip = { diff --git a/drivers/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c index d2c5321dd025..31d68183b743 100644 --- a/drivers/pinctrl/pinctrl-stmfx.c +++ b/drivers/pinctrl/pinctrl-stmfx.c @@ -599,7 +599,7 @@ static void stmfx_pinctrl_irq_print_chip(struct irq_data *d, struct seq_file *p) struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(d); struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip); - seq_printf(p, dev_name(pctl->dev)); + seq_puts(p, dev_name(pctl->dev)); } static const struct irq_chip stmfx_pinctrl_irq_chip = { diff --git a/drivers/pinctrl/pinctrl-sx150x.c b/drivers/pinctrl/pinctrl-sx150x.c index fd0331a87cda..dbe14566e1f3 100644 --- a/drivers/pinctrl/pinctrl-sx150x.c +++ b/drivers/pinctrl/pinctrl-sx150x.c @@ -584,7 +584,7 @@ static void sx150x_irq_print_chip(struct irq_data *d, struct seq_file *p) struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct sx150x_pinctrl *pctl = gpiochip_get_data(gc); - seq_printf(p, pctl->client->name); + seq_puts(p, pctl->client->name); } static const struct irq_chip sx150x_irq_chip = { diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c index 5a403915fed2..8742b440339e 100644 --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c @@ -2290,7 +2290,7 @@ static void rzg2l_gpio_irq_print_chip(struct irq_data *data, struct seq_file *p) { struct gpio_chip *gc = irq_data_get_irq_chip_data(data); - seq_printf(p, dev_name(gc->parent)); + seq_puts(p, dev_name(gc->parent)); } static int rzg2l_gpio_irq_set_wake(struct irq_data *data, unsigned int on)