drm/amdgpu: fix incorrect use of drm_file->pid

That's the PID of the creator of the file (usually the X server) and not
the end user of the file.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
index cb62a90d0686726f6eb6473b566f4f04392decda..1cafe8d83a4dbaa60915801a7849a81613ef69c0 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
@@ -55,7 +55,6 @@ static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
 {
        struct file *filp = fget(fd);
        struct drm_file *file;
-       struct pid *pid;
        struct amdgpu_fpriv *fpriv;
        struct amdgpu_ctx *ctx;
        uint32_t id;
@@ -63,20 +62,10 @@ static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
        if (!filp)
                return -EINVAL;
 
-       pid = get_pid(((struct drm_file *)filp->private_data)->pid);
-
-       mutex_lock(&adev->ddev->filelist_mutex);
-       list_for_each_entry(file, &adev->ddev->filelist, lhead) {
-               if (file->pid != pid)
-                       continue;
-
-               fpriv = file->driver_priv;
-               idr_for_each_entry(&fpriv->ctx_mgr.ctx_handles, ctx, id)
-                               amdgpu_ctx_priority_override(ctx, priority);
-       }
-       mutex_unlock(&adev->ddev->filelist_mutex);
-
-       put_pid(pid);
+       file = filp->private_data;
+       fpriv = file->driver_priv;
+       idr_for_each_entry(&fpriv->ctx_mgr.ctx_handles, ctx, id)
+               amdgpu_ctx_priority_override(ctx, priority);
 
        fput(filp);