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drm/amdgpu: use ref to keep job alive

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this is to fix fatal page fault error that occured if:
job is signaled/released after its timeout work is already
put to the global queue (in this case the cancel_delayed_work
will return false), which will lead to NX-protection error
page fault during job_timeout_func.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Monk Liu
2016-03-10 12:14:44 +08:00
committed by Alex Deucher
parent 0de2479c95
commit b6723c8da5
5 changed files with 35 additions and 4 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu.h
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@@ -750,7 +750,9 @@ int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
struct amdgpu_job **job);
int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size,
struct amdgpu_job **job);
void amdgpu_job_free(struct amdgpu_job *job);
void amdgpu_job_free_func(struct kref *refcount);
int amdgpu_job_submit(struct amdgpu_job *job, struct amdgpu_ring *ring,
struct amd_sched_entity *entity, void *owner,
struct fence **f);