[PATCH] drm/amdkfd: not restore userptr buffer if kfd process has been removed

[Xiaogang.Chen]

From: Xiaogang Chen <xiaogang.chen at amd.com>

When kfd process has been terminated not restore userptr buffer after
mmu notifier invalidates a range.

Signed-off-by: Xiaogang Chen<Xiaogang.Chen at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index ce5ca304dba9..dab4a6a74c70 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -2524,11 +2524,14 @@ int amdgpu_amdkfd_evict_userptr(struct mmu_interval_notifier *mni,
 		/* First eviction, stop the queues */
 		r = kgd2kfd_quiesce_mm(mni->mm,
 				       KFD_QUEUE_EVICTION_TRIGGER_USERPTR);
-		if (r)
+
+		if (r && r != -ESRCH) {
 			pr_err("Failed to quiesce KFD\n");
-		queue_delayed_work(system_freezable_wq,
-			&process_info->restore_userptr_work,
-			msecs_to_jiffies(AMDGPU_USERPTR_RESTORE_DELAY_MS));
+
+			queue_delayed_work(system_freezable_wq,
+				&process_info->restore_userptr_work,
+				msecs_to_jiffies(AMDGPU_USERPTR_RESTORE_DELAY_MS));
+		}
 	}
 	mutex_unlock(&process_info->notifier_lock);
 
-- 
2.25.1