[PATCH 2/3] drm/amdgpu: set the VM pointer to NULL in amdgpu_job_prepare

[Christian König]

As soon as the prepare phase is completed the VM might be released,
better set it to NULL.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index b9d08bc96581..7fdf7b047317 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -367,6 +367,13 @@ 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;
-- 
2.34.1