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drm/amd/display: Constify 'struct bin_attribute'

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The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Link: https://lore.kernel.org/r/20241216-sysfs-const-bin_attr-drm-v1-5-210f2b36b9bf@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Weißschuh 2024-12-16 12:34:51 +01:00 committed by Greg Kroah-Hartman
parent 2d0f5001b6
commit 600aa8d31a
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
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@ -614,7 +614,7 @@ static void update_config(void *handle, struct cp_psp_stream_config *config)
* incorrect/corrupted and we should correct our SRM by getting it from PSP
*/
static ssize_t srm_data_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buffer,
const struct bin_attribute *bin_attr, char *buffer,
loff_t pos, size_t count)
{
struct hdcp_workqueue *work;
@ -638,7 +638,7 @@ static ssize_t srm_data_write(struct file *filp, struct kobject *kobj,
}
static ssize_t srm_data_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buffer,
const struct bin_attribute *bin_attr, char *buffer,
loff_t pos, size_t count)
{
struct hdcp_workqueue *work;
@ -698,8 +698,8 @@ static ssize_t srm_data_read(struct file *filp, struct kobject *kobj,
static const struct bin_attribute data_attr = {
.attr = {.name = "hdcp_srm", .mode = 0664},
.size = PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, /* Limit SRM size */
.write = srm_data_write,
.read = srm_data_read,
.write_new = srm_data_write,
.read_new = srm_data_read,
};
struct hdcp_workqueue *hdcp_create_workqueue(struct amdgpu_device *adev,