[PATCH 5/5] drm/amd/display: Constify 'struct bin_attribute'

[Harry Wentland]

On 2024-12-16 06:34, Thomas Weißschuh wrote:
> 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 at weissschuh.net>

Reviewed-by: Harry Wentland <harry.wentland at amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
> index e339c7a8d541c962aa44ae25ad97b864285394b8..e27d077396327bbe25014aec5b978293b1c20dac 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
> @@ -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,
>