drm/amdgpu: add err check for pin userptr

Missing error check if the operation failed.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index d4bac5f49939..8051cb9b8c1e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -587,9 +587,13 @@ static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm,
         uint32_t flags = amdgpu_ttm_tt_pte_flags(gtt->adev, ttm, bo_mem);
         int r;
 
-        if (gtt->userptr)
-                amdgpu_ttm_tt_pin_userptr(ttm);
-
+        if (gtt->userptr) {
+                r = amdgpu_ttm_tt_pin_userptr(ttm);
+                if (r) {
+                        DRM_ERROR("failed to pin userptr\n");
+                        return r;
+                }
+        }
         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
         if (!ttm->num_pages) {
                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",