drm/radeon: check return value of radeon_fence_emit

Function radeon_fence_emit() returns -ENOMEM if there is no enough
memory. And in this case, function radeon_ring_unlock_undo() rather than
function radeon_ring_unlock_commit() should be called. However, in
function radeon_test_create_and_emit_fence(), the return value of
radeon_fence_emit() is ignored. This patch adds the check.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_test.c b/drivers/gpu/drm/radeon/radeon_test.c
index 4fdc7bda7a7d..f5e9abfadb56 100644
--- a/drivers/gpu/drm/radeon/radeon_test.c
+++ b/drivers/gpu/drm/radeon/radeon_test.c
@@ -298,7 +298,12 @@ static int radeon_test_create_and_emit_fence(struct radeon_device *rdev,
                         DRM_ERROR("Failed to lock ring A %d\n", ring->idx);
                         return r;
                 }
-                radeon_fence_emit(rdev, fence, ring->idx);
+                r = radeon_fence_emit(rdev, fence, ring->idx);
+                if (r) {
+                        DRM_ERROR("Failed to emit fence\n");
+                        radeon_ring_unlock_undo(rdev, ring);
+                        return r;
+                }
                 radeon_ring_unlock_commit(rdev, ring, false);
         }
         return 0;