iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/amdgpu: install ctx entities with cmpxchg

Browse Source 
Since we removed the context lock we need to make sure that not two threads
are trying to install an entity at the same time.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: 461fa7b0ac565e ("drm/amdgpu: remove ctx->lock")
Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2022-02-23 14:35:31 +01:00 committed by Alex Deucher
parent b664a56e86
commit d18b8eadd8
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
View File

@ -205,9 +205,15 @@ static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, u32 hw_ip,
if (r)
goto error_free_entity;
ctx->entities[hw_ip][ring] = entity;
/* It's not an error if we fail to install the new entity */
if (cmpxchg(&ctx->entities[hw_ip][ring], NULL, entity))
goto cleanup_entity;
return 0;
cleanup_entity:
drm_sched_entity_fini(&entity->entity);
error_free_entity:
kfree(entity);