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Merge patch series "scsi: libsas: Fix the failure of adding phy with zero-address to new port"

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Xingui Yang <yangxingui@huawei.com> says:

This series is to solve the problem of a BUG() when adding phy with
zero address to a new port.

Link: https://lore.kernel.org/r/20240312141103.31358-1-yangxingui@huawei.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Martin K. Petersen 2024-04-20 10:40:04 -04:00
commit 9cf0c1236a
2 changed files with 30 additions and 23 deletions
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38
drivers/scsi/libsas/sas_expander.c
View File

@ -26,6 +26,28 @@ static int sas_configure_phy(struct domain_device *dev, int phy_id,
u8 *sas_addr, int include);
static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr);
static void sas_port_add_ex_phy(struct sas_port *port, struct ex_phy *ex_phy)
{
sas_port_add_phy(port, ex_phy->phy);
ex_phy->port = port;
ex_phy->phy_state = PHY_DEVICE_DISCOVERED;
}
static void sas_ex_add_parent_port(struct domain_device *dev, int phy_id)
{
struct expander_device *ex = &dev->ex_dev;
struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
if (!ex->parent_port) {
ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
/* FIXME: error handling */
BUG_ON(!ex->parent_port);
BUG_ON(sas_port_add(ex->parent_port));
sas_port_mark_backlink(ex->parent_port);
}
sas_port_add_ex_phy(ex->parent_port, ex_phy);
}
/* ---------- SMP task management ---------- */
/* Give it some long enough timeout. In seconds. */
@ -239,8 +261,7 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
/* help some expanders that fail to zero sas_address in the 'no
* device' case
*/
if (phy->attached_dev_type == SAS_PHY_UNUSED ||
phy->linkrate < SAS_LINK_RATE_1_5_GBPS)
if (phy->attached_dev_type == SAS_PHY_UNUSED)
memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
else
memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
@ -857,9 +878,7 @@ static bool sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
SAS_ADDR_SIZE) && ephy->port) {
sas_port_add_phy(ephy->port, phy->phy);
phy->port = ephy->port;
phy->phy_state = PHY_DEVICE_DISCOVERED;
sas_port_add_ex_phy(ephy->port, phy);
return true;
}
}
@ -963,11 +982,11 @@ static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
/* Parent and domain coherency */
if (!dev->parent && sas_phy_match_port_addr(dev->port, ex_phy)) {
sas_add_parent_port(dev, phy_id);
sas_ex_add_parent_port(dev, phy_id);
return 0;
}
if (dev->parent && sas_phy_match_dev_addr(dev->parent, ex_phy)) {
sas_add_parent_port(dev, phy_id);
sas_ex_add_parent_port(dev, phy_id);
if (ex_phy->routing_attr == TABLE_ROUTING)
sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
return 0;
@ -1849,9 +1868,12 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent,
if (phy->port) {
sas_port_delete_phy(phy->port, phy->phy);
sas_device_set_phy(found, phy->port);
if (phy->port->num_phys == 0)
if (phy->port->num_phys == 0) {
list_add_tail(&phy->port->del_list,
&parent->port->sas_port_del_list);
if (ex_dev->parent_port == phy->port)
ex_dev->parent_port = NULL;
}
phy->port = NULL;
}
}

15
drivers/scsi/libsas/sas_internal.h
View File

@ -189,21 +189,6 @@ static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_devic
}
}
static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
{
struct expander_device *ex = &dev->ex_dev;
struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
if (!ex->parent_port) {
ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
/* FIXME: error handling */
BUG_ON(!ex->parent_port);
BUG_ON(sas_port_add(ex->parent_port));
sas_port_mark_backlink(ex->parent_port);
}
sas_port_add_phy(ex->parent_port, ex_phy->phy);
}
static inline struct domain_device *sas_alloc_device(void)
{
struct domain_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL);