From: Gustavo Padovan gustavo.padovan@collabora.co.uk
Iterate over the array of fences and wait for all of the to finish.
Signed-off-by: Gustavo Padovan gustavo.padovan@collabora.co.uk --- drivers/dma-buf/fence.c | 16 ++++++++++++++++ include/linux/fence.h | 1 + 2 files changed, 17 insertions(+)
diff --git a/drivers/dma-buf/fence.c b/drivers/dma-buf/fence.c index a3fe3e7..31e554b 100644 --- a/drivers/dma-buf/fence.c +++ b/drivers/dma-buf/fence.c @@ -532,6 +532,22 @@ fence_init(struct fence *fence, const struct fence_ops *ops, EXPORT_SYMBOL(fence_init);
/** + * fence_collection_wait - Wait for collection of fences to signal + * @collection: [in] the collection to wait on + * + * This functions simplifies the waiting process when one needs to + * wait for many fences at the same time. + */ +void fence_collection_wait(struct fence_collection *collection) +{ + int i; + + for (i = 0 ; i < collection->num_fences ; i++) + fence_wait(collection->fences[i], false); +} +EXPORT_SYMBOL(fence_collection_wait); + +/** * fence_collection_put - put all the fences in a collection * @collection: [in] the collection to put fences * diff --git a/include/linux/fence.h b/include/linux/fence.h index 3f871b0..52f1aea 100644 --- a/include/linux/fence.h +++ b/include/linux/fence.h @@ -244,6 +244,7 @@ int fence_add_callback(struct fence *fence, struct fence_cb *cb, bool fence_remove_callback(struct fence *fence, struct fence_cb *cb); void fence_enable_sw_signaling(struct fence *fence);
+void fence_collection_wait(struct fence_collection *collection); void fence_collection_put(struct fence_collection *collection);
/**