[RFC PATCH 17/17] Revert "drm/amdgpu: Remove verify_access shortcut for KFD BOs"

[Felix Kuehling]

From: Rajneesh Bhardwaj <rajneesh.bhardwaj at amd.com>

This reverts commit 12ebe2b9df192a2a8580cd9ee3e9940c116913c8.

This is just a temporary work around and will be dropped later.

Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 99ea29fd12bd..be7eb85af066 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -178,6 +178,13 @@ static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 {
 	struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
 
+	/*
+	 * Don't verify access for KFD BOs. They don't have a GEM
+	 * object associated with them.
+	 */
+	if (abo->kfd_bo)
+		return 0;
+
 	if (amdgpu_ttm_tt_get_usermm(bo->ttm))
 		return -EPERM;
 	return drm_vma_node_verify_access(&abo->tbo.base.vma_node,
-- 
2.17.1