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tee: make tee_class constant

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Now that the driver core allows for struct class to be in read-only
memory, we should make all 'class' structures declared at build time
placing them into read-only memory, instead of having to be dynamically
allocated at runtime.

Cc: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Link: https://lore.kernel.org/r/2023100613-lustiness-affiliate-7dcb@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-10-06 16:00:14 +02:00
parent 35479e2e49
commit 066eaa69b0
1 changed files with 11 additions and 10 deletions
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21
drivers/tee/tee_core.c
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@ -40,7 +40,10 @@ static const uuid_t tee_client_uuid_ns = UUID_INIT(0x58ac9ca0, 0x2086, 0x4683,
static DECLARE_BITMAP(dev_mask, TEE_NUM_DEVICES);
static DEFINE_SPINLOCK(driver_lock);
static struct class *tee_class;
static const struct class tee_class = {
.name = "tee",
};
static dev_t tee_devt;
struct tee_context *teedev_open(struct tee_device *teedev)
@ -919,7 +922,7 @@ struct tee_device *tee_device_alloc(const struct tee_desc *teedesc,
teedesc->flags & TEE_DESC_PRIVILEGED ? "priv" : "",
teedev->id - offs);
teedev->dev.class = tee_class;
teedev->dev.class = &tee_class;
teedev->dev.release = tee_release_device;
teedev->dev.parent = dev;
@ -1112,7 +1115,7 @@ tee_client_open_context(struct tee_context *start,
dev = &start->teedev->dev;
do {
dev = class_find_device(tee_class, dev, &match_data, match_dev);
dev = class_find_device(&tee_class, dev, &match_data, match_dev);
if (!dev) {
ctx = ERR_PTR(-ENOENT);
break;
@ -1226,10 +1229,10 @@ static int __init tee_init(void)
{
int rc;
tee_class = class_create("tee");
if (IS_ERR(tee_class)) {
rc = class_register(&tee_class);
if (rc) {
pr_err("couldn't create class\n");
return PTR_ERR(tee_class);
return rc;
}
rc = alloc_chrdev_region(&tee_devt, 0, TEE_NUM_DEVICES, "tee");
@ -1249,8 +1252,7 @@ static int __init tee_init(void)
out_unreg_chrdev:
unregister_chrdev_region(tee_devt, TEE_NUM_DEVICES);
out_unreg_class:
class_destroy(tee_class);
tee_class = NULL;
class_unregister(&tee_class);
return rc;
}
@ -1259,8 +1261,7 @@ static void __exit tee_exit(void)
{
bus_unregister(&tee_bus_type);
unregister_chrdev_region(tee_devt, TEE_NUM_DEVICES);
class_destroy(tee_class);
tee_class = NULL;
class_unregister(&tee_class);
}
subsys_initcall(tee_init);