diff options
| author | Gustavo Padovan <gustavo.padovan@collabora.co.uk> | 2016-08-05 10:39:36 -0300 |
|---|---|---|
| committer | Sumit Semwal <sumit.semwal@linaro.org> | 2016-08-11 15:33:24 +0530 |
| commit | 972526a4093243fdaf77dd7c6f8b11fba5b15864 (patch) | |
| tree | 49121dcbbcec8f6c7acc8cd6762395e81183c18b | |
| parent | a02b9dc90d844cc7df7b63264e7920cc425052d9 (diff) | |
| download | linux-972526a4093243fdaf77dd7c6f8b11fba5b15864.tar.bz2 | |
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>
| -rw-r--r-- | drivers/dma-buf/sync_file.c | 23 | ||||
| -rw-r--r-- | include/linux/sync_file.h | 1 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c index ac9c250af302..2873760e02a9 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) { diff --git a/include/linux/sync_file.h b/include/linux/sync_file.h index 2efc5ec60575..f7de5a0b3d12 100644 --- a/include/linux/sync_file.h +++ b/include/linux/sync_file.h @@ -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 */ |