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drm/amdgpu: add a missing lock for AMDGPU_SCHED 

[ Upstream commit 2397e3d8d2 ]

mgr->ctx_handles should be protected by mgr->lock.

v2: improve commit message
v3: add a Fixes tag

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Fixes: 52c6a62c64 ("drm/amdgpu: add interface for editing a foreign process's priority v3")
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chia-I Wu 2023-04-26 15:54:55 -07:00 committed by Greg Kroah-Hartman
parent 31a6970129
commit ba3c3d23cc
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
View File

@ -38,6 +38,7 @@ static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
{
struct fd f = fdget(fd);
struct amdgpu_fpriv *fpriv;
struct amdgpu_ctx_mgr *mgr;
struct amdgpu_ctx *ctx;
uint32_t id;
int r;
@ -51,8 +52,11 @@ static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
return r;
}
idr_for_each_entry(&fpriv->ctx_mgr.ctx_handles, ctx, id)
mgr = &fpriv->ctx_mgr;
mutex_lock(&mgr->lock);
idr_for_each_entry(&mgr->ctx_handles, ctx, id)
amdgpu_ctx_priority_override(ctx, priority);
mutex_unlock(&mgr->lock);
fdput(f);
return 0;