dma-buf/sync-file: fix logic error in new fence merge code

When the array is empty because everything is signaled we can't use
add_fence() to add something because that would filter the signaled
fence again.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: 519f490db07e ("dma-buf/sync-file: fix warning about fence containers")
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220329070001.134180-1-christian.koenig@amd.com

diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
index b8dea4e..514d213 100644 (file)
--- a/drivers/dma-buf/sync_file.c
+++ b/drivers/dma-buf/sync_file.c
@@ -262,7 +262,7 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
        }
 
        if (index == 0)
-               add_fence(fences, &index, dma_fence_get_stub());
+               fences[index++] = dma_fence_get_stub();
 
        if (num_fences > index) {
                struct dma_fence **tmp;