Merge tag 'hwparam-20170420' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowell...

[mirror_ubuntu-bionic-kernel.git] / drivers / dma-buf / dma-fence.c

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index d195d617076d6cd86f1cea471a6d2d8a5835a636..0918d3f003d65d633a6e06a2c8d41a47fc42f9b5 100644 (file)
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -240,6 +240,8 @@ EXPORT_SYMBOL(dma_fence_enable_sw_signaling);
  * after it signals with dma_fence_signal. The callback itself can be called
  * from irq context.
  *
+ * Returns 0 in case of success, -ENOENT if the fence is already signaled
+ * and -EINVAL in case of error.
  */
 int dma_fence_add_callback(struct dma_fence *fence, struct dma_fence_cb *cb,
                           dma_fence_func_t func)