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

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Document return values for this function.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170215175725.6692-1-gustavo@padovan.org
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Gustavo Padovan 2017-02-15 15:57:25 -02:00 committed by Sumit Semwal
parent a49bf8fb0a
commit f642de16c8
1 changed files with 2 additions and 0 deletions
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drivers/dma-buf/dma-fence.c
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@ -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)