[PATCH] drm/amdgpu: Remove redundant call to priority_is_valid()

[Alex Deucher]

On Tue, Oct 17, 2023 at 9:22 PM Luben Tuikov <luben.tuikov at amd.com> wrote:
>
> Remove a redundant call to amdgpu_ctx_priority_is_valid() from
> amdgpu_ctx_priority_permit(), which is called from amdgpu_ctx_init() which is
> called from amdgpu_ctx_alloc() which is called from amdgpu_ctx_ioctl(), where
> we've called amdgpu_ctx_priority_is_valid() already first thing in the
> function.
>
> Cc: Alex Deucher <Alexander.Deucher at amd.com>
> Cc: Christian König <christian.koenig at amd.com>
> Signed-off-by: Luben Tuikov <luben.tuikov at amd.com>

Please push this to drm-misc since it depends on your previous patches.

Alex

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 15 ++++++++-------
>  1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
> index 68db924161ef66..4c6ffca97c4512 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
> @@ -56,6 +56,10 @@ bool amdgpu_ctx_priority_is_valid(int32_t ctx_prio)
>                 return true;
>         default:
>         case AMDGPU_CTX_PRIORITY_UNSET:
> +               /* UNSET priority is not valid and we don't carry that
> +                * around, but set it to NORMAL in the only place this
> +                * function is called, amdgpu_ctx_ioctl().
> +                */
>                 return false;
>         }
>  }
> @@ -96,9 +100,6 @@ amdgpu_ctx_to_drm_sched_prio(int32_t ctx_prio)
>  static int amdgpu_ctx_priority_permit(struct drm_file *filp,
>                                       int32_t priority)
>  {
> -       if (!amdgpu_ctx_priority_is_valid(priority))
> -               return -EINVAL;
> -
>         /* NORMAL and below are accessible by everyone */
>         if (priority <= AMDGPU_CTX_PRIORITY_NORMAL)
>                 return 0;
> @@ -625,8 +626,6 @@ static int amdgpu_ctx_query2(struct amdgpu_device *adev,
>         return 0;
>  }
>
> -
> -
>  static int amdgpu_ctx_stable_pstate(struct amdgpu_device *adev,
>                                     struct amdgpu_fpriv *fpriv, uint32_t id,
>                                     bool set, u32 *stable_pstate)
> @@ -669,8 +668,10 @@ int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
>         id = args->in.ctx_id;
>         priority = args->in.priority;
>
> -       /* For backwards compatibility reasons, we need to accept
> -        * ioctls with garbage in the priority field */
> +       /* For backwards compatibility, we need to accept ioctls with garbage
> +        * in the priority field. Garbage values in the priority field, result
> +        * in the priority being set to NORMAL.
> +        */
>         if (!amdgpu_ctx_priority_is_valid(priority))
>                 priority = AMDGPU_CTX_PRIORITY_NORMAL;
>
>
> base-commit: 915718484b8fa1eede4499a939e2e4fc0d85caa4
> prerequisite-patch-id: a36f628997d923f66da5342e760e8b45ff959fb8
> prerequisite-patch-id: f15148c302329c0c60d86040571c61d367bd05e7
> --
> 2.42.0
>