[PATCH] dma-buf/dma-fence: improve doc for dma_fence_add_callback()

* [PATCH] dma-buf/dma-fence: improve doc for dma_fence_add_callback()
@ 2017-02-15 17:57 Gustavo Padovan
  2017-02-15 20:57 ` Chris Wilson
  0 siblings, 1 reply; 3+ messages in thread
From: Gustavo Padovan @ 2017-02-15 17:57 UTC (permalink / raw)
  To: dri-devel; +Cc: Gustavo Padovan

From: Gustavo Padovan <gustavo.padovan@collabora.com>

Document return values for this function.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
---
 drivers/dma-buf/dma-fence.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index d1f1f45..809b397 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -239,6 +239,8 @@ 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)
-- 
2.9.3

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