dma-buf/sync_file: add sync_file_get_fence() (972526a4) · Commits · 戴 / test

Creates a function that given an sync file descriptor returns a fence containing all fences in the sync_file. v2: Comments by Daniel Vetter - Adapt to new version of fence_collection_init() - Hold a reference for the fence we return v3: - Adapt to use fput() directly - rename to sync_file_get_fence() as we always return one fence v4: Adapt to use fence_array v5: set fence through fence_get() Signed-off-by:

Gustavo Padovan <gustavo.padovan@collabora.co.uk> Reviewed-by:

Chris Wilson <chris@chris-wilson.co.uk> Acked-by:

Christian König <christian.koenig@amd.com> Signed-off-by:

Sumit Semwal <sumit.semwal@linaro.org>

drivers/dma-buf/sync_file.c

+23 −0

Original line number	Diff line number	Diff line
		@@ -116,6 +116,29 @@ err:
		return NULL;
		}

		/**
		* sync_file_get_fence - get the fence related to the sync_file fd
		* @fd: sync_file fd to get the fence from
		*
		* Ensures @fd references a valid sync_file and returns a fence that
		* represents all fence in the sync_file. On error NULL is returned.
		*/
		struct fence *sync_file_get_fence(int fd)
		{
		struct sync_file *sync_file;
		struct fence *fence;

		sync_file = sync_file_fdget(fd);
		if (!sync_file)
		return NULL;

		fence = fence_get(sync_file->fence);
		fput(sync_file->file);

		return fence;
		}
		EXPORT_SYMBOL(sync_file_get_fence);

		static int sync_file_set_fence(struct sync_file *sync_file,
		struct fence **fences, int num_fences)
		{

include/linux/sync_file.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -46,5 +46,6 @@ struct sync_file {
		};

		struct sync_file sync_file_create(struct fence fence);
		struct fence *sync_file_get_fence(int fd);

		#endif /* _LINUX_SYNC_H */

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