diff options
| -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 */ |