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drm/amdgpu: Retain job->vm in amdgpu_job_prepare_job

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The field job->vm is used in function amdgpu_job_run to get the page
table re-generation counter and decide whether the job should be skipped.

Specifically, function amdgpu_vm_generation checks if the VM is valid for this job to use.
For instance, if a gfx job depends on a cancelled sdma job from entity vm->delayed,
then the gfx job should be skipped.

Fixes: 26c95e838e ("drm/amdgpu: set the VM pointer to NULL in amdgpu_job_prepare")
Signed-off-by: YuanShang <YuanShang.Mao@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit ed76936c6b)
Cc: stable@vger.kernel.org
This commit is contained in:
YuanShang 2025-07-23 16:44:49 +08:00 committed by Alex Deucher
parent 1c8dc3e088
commit c00d8b79fd
1 changed files with 0 additions and 7 deletions
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7
drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
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@ -365,13 +365,6 @@ amdgpu_job_prepare_job(struct drm_sched_job *sched_job,
dev_err(ring->adev->dev, "Error getting VM ID (%d)\n", r);
goto error;
}
/*
* The VM structure might be released after the VMID is
* assigned, we had multiple problems with people trying to use
* the VM pointer so better set it to NULL.
*/
if (!fence)
job->vm = NULL;
return fence;
}