From f642de16c86e9f31d084aa98a50d3a2c923450c2 Mon Sep 17 00:00:00 2001 From: Gustavo Padovan Date: Wed, 15 Feb 2017 15:57:25 -0200 Subject: [PATCH] dma-buf/dma-fence: improve doc for dma_fence_add_callback() Document return values for this function. Signed-off-by: Gustavo Padovan Reviewed-by: Chris Wilson Signed-off-by: Sumit Semwal Link: http://patchwork.freedesktop.org/patch/msgid/20170215175725.6692-1-gustavo@padovan.org --- 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 d1f1f456f5c4..809b397e915f 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) -- 2.30.2