Commit 8f619737 authored by Christian König's avatar Christian König
Browse files

dma-buf: return only unsignaled fences in dma_fence_unwrap_for_each v3 



dma_fence_chain containers cleanup signaled fences automatically, so
filter those out from arrays as well.

v2: fix missing walk over the array
v3: massively simplify the patch and actually update the description.

Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220518135844.3338-4-christian.koenig@amd.com
parent 01357a5a

include/linux/dma-fence-unwrap.h

+5 −1
Original line number Diff line number Diff line
@@ -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