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Commit 972526a4 authored by Gustavo Padovan's avatar Gustavo Padovan Committed by Sumit Semwal
Browse files

dma-buf/sync_file: add sync_file_get_fence() 



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: default avatarGustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Acked-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarSumit Semwal <sumit.semwal@linaro.org>
parent a02b9dc9

drivers/dma-buf/sync_file.c

+23 −0
Original line number Diff line number Diff line
@@ -116,6 +116,29 @@ static struct sync_file *sync_file_fdget(int fd) 
	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 */