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authorGustavo Padovan <gustavo.padovan@collabora.com>2017-02-15 20:57:25 +0300
committerSumit Semwal <sumit.semwal@linaro.org>2017-02-16 07:28:02 +0300
commitf642de16c86e9f31d084aa98a50d3a2c923450c2 (patch)
tree31a2b54cd28ed5c538edd1ecd11ac0e016e515d5 /drivers/dma-buf/dma-fence.c
parenta49bf8fb0a311cc8f68329e9853c15c6f0d12f9e (diff)
downloadlinux-f642de16c86e9f31d084aa98a50d3a2c923450c2.tar.xz
dma-buf/dma-fence: improve doc for dma_fence_add_callback()
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
Diffstat (limited to 'drivers/dma-buf/dma-fence.c')
-rw-r--r--drivers/dma-buf/dma-fence.c2
1 files changed, 2 insertions, 0 deletions
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)