The return code of dma_fence_signal() is not really useful as there is
nothing reasonable to do if a fence was already signaled. That return
code shall be removed from the kernel.

Moreover, dma_fence_signal() should not be used to check whether fences
are signaled. That's what dma_fence_is_signaled() and
dma_fence_test_signaled_flag() exist for.

Replace the non-canonical usage of dma_fence_signal().

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Philipp Stanner <phasta@kernel.org>
---
 drivers/dma-buf/st-dma-fence.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma-buf/st-dma-fence.c b/drivers/dma-buf/st-dma-fence.c
index 27a36045410b..4dbe39c58bfb 100644
--- a/drivers/dma-buf/st-dma-fence.c
+++ b/drivers/dma-buf/st-dma-fence.c
@@ -126,7 +126,7 @@ static int test_signaling(void *arg)
 		goto err_free;
 	}
 
-	if (dma_fence_signal(f)) {
+	if (dma_fence_check_and_signal(f)) {
 		pr_err("Fence reported being already signaled\n");
 		goto err_free;
 	}
@@ -136,7 +136,7 @@ static int test_signaling(void *arg)
 		goto err_free;
 	}
 
-	if (!dma_fence_signal(f)) {
+	if (!dma_fence_test_signaled_flag(f)) {
 		pr_err("Fence reported not being already signaled\n");
 		goto err_free;
 	}
-- 
2.49.0