Am 25.03.20 um 06:47 schrieb xinhui pan:
Hit panic during GPU recovery test. drm_sched_entity_select_rq might
set NULL to rq. So add a check like drm_sched_job_init does.
NAK, the rq should never be set to NULL in the first place.
How did that happened?
Regards,
Christian.
Cc: Christian König <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: Felix Kuehling <[email protected]>
Signed-off-by: xinhui pan <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
index cf96c335b258..d30d103e48a2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
@@ -95,6 +95,8 @@ static int amdgpu_vm_sdma_commit(struct
amdgpu_vm_update_params *p,
int r;
entity = p->direct ? &p->vm->direct : &p->vm->delayed;
+ if (!entity->rq)
+ return -ENOENT;
ring = container_of(entity->rq->sched, struct amdgpu_ring, sched);
WARN_ON(ib->length_dw == 0);
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