The return code of dma_fence_signal() is not useful and shall be removed
from the kernel. To do so, the few users who rely on the return code
must be ported.

Use dma_fence_check_and_signal() and mapp its boolean return code to
dma_fence_signal()'s former value for already-signaled fences.

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Philipp Stanner <phasta@kernel.org>
---
 drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c b/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c
index 1bcc67977f48..eaf2e91f8e97 100644
--- a/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c
+++ b/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c
@@ -692,7 +692,7 @@ static int threaded_fence_signal(void *arg)
 
 	msleep(20);
 
-	return dma_fence_signal(fence);
+	return dma_fence_check_and_signal(fence) ? -EINVAL : 0;
 }
 
 static void ttm_bo_validate_move_fence_not_signaled(struct kunit *test)
-- 
2.49.0