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-rw-r--r--include/linux/dma-fence-unwrap.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/dma-fence-unwrap.h b/include/linux/dma-fence-unwrap.h
index e7c219da4ed7..a4d342fef8e0 100644
--- a/include/linux/dma-fence-unwrap.h
+++ b/include/linux/dma-fence-unwrap.h
@@ -43,9 +43,13 @@ struct dma_fence *dma_fence_unwrap_next(struct dma_fence_unwrap *cursor);
* Unwrap dma_fence_chain and dma_fence_array containers and deep dive into all
* potential fences in them. If @head is just a normal fence only that one is
* returned.
+ *
+ * Note that signalled fences are opportunistically filtered out, which
+ * means the iteration is potentially over no fence at all.
*/
#define dma_fence_unwrap_for_each(fence, cursor, head) \
for (fence = dma_fence_unwrap_first(head, cursor); fence; \
- fence = dma_fence_unwrap_next(cursor))
+ fence = dma_fence_unwrap_next(cursor)) \
+ if (!dma_fence_is_signaled(fence))
#endif