drm/amdgpu: fix no-vmid job

[  132.036658] amdgpu 0000:22:00.0: VM IB without ID
[  132.036709] [drm:amdgpu_job_run [amdgpu]] *ERROR* Error scheduling IBs (-22)
[  132.036755] [drm:amd_sched_main [amdgpu]] *ERROR* Failed to run job!

root cause is fence is signaled during sync transfer.
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_job.c

@@ -139,7 +139,7 @@ static struct dma_fence *amdgpu_job_dependency(struct amd_sched_job *sched_job)
 
 	struct dma_fence *fence = amdgpu_sync_get_fence(&job->sync);
 
-	if (fence == NULL && vm && !job->vm_id) {
+	while (fence == NULL && vm && !job->vm_id) {
 		struct amdgpu_ring *ring = job->ring;
 		int r;