drm/amdgpu: use ref to keep job alive

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>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 9025671d21c3..d7e0b0b9a1bc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -872,6 +872,7 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
         r = amd_sched_job_init(&job->base, &ring->sched,
                                                 &p->ctx->rings[ring->idx].entity,
                                                 amdgpu_job_timeout_func,
+                                                amdgpu_job_free_func,
                                                 p->filp, &fence);
         if (r) {
                 amdgpu_job_free(job);