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author | Gustavo Padovan <gustavo.padovan@collabora.co.uk> | 2016-08-05 13:39:36 (GMT) |
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committer | Sumit Semwal <sumit.semwal@linaro.org> | 2016-08-11 10:03:24 (GMT) |
commit | 972526a4093243fdaf77dd7c6f8b11fba5b15864 (patch) | |
tree | 49121dcbbcec8f6c7acc8cd6762395e81183c18b /drivers/dma-buf/sync_file.c | |
parent | a02b9dc90d844cc7df7b63264e7920cc425052d9 (diff) | |
download | linux-972526a4093243fdaf77dd7c6f8b11fba5b15864.tar.xz |
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: 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>
Diffstat (limited to 'drivers/dma-buf/sync_file.c')
-rw-r--r-- | drivers/dma-buf/sync_file.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c index ac9c250..2873760 100644 --- a/drivers/dma-buf/sync_file.c +++ b/drivers/dma-buf/sync_file.c @@ -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) { |