diff options
Diffstat (limited to 'drivers/rapidio/rio.c')
| -rw-r--r-- | drivers/rapidio/rio.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c index 0dcaa660cba1..840802943dc0 100644 --- a/drivers/rapidio/rio.c +++ b/drivers/rapidio/rio.c @@ -1848,7 +1848,9 @@ EXPORT_SYMBOL_GPL(rio_release_dma); * Initializes RapidIO capable DMA channel for the specified data transfer. * Uses DMA channel private extension to pass information related to remote * target RIO device. - * Returns pointer to DMA transaction descriptor or NULL if failed. + * + * Returns: pointer to DMA transaction descriptor if successful, + * error-valued pointer or NULL if failed. */ struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan, u16 destid, struct rio_dma_data *data, @@ -1883,7 +1885,9 @@ EXPORT_SYMBOL_GPL(rio_dma_prep_xfer); * Initializes RapidIO capable DMA channel for the specified data transfer. * Uses DMA channel private extension to pass information related to remote * target RIO device. - * Returns pointer to DMA transaction descriptor or NULL if failed. + * + * Returns: pointer to DMA transaction descriptor if successful, + * error-valued pointer or NULL if failed. */ struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev, struct dma_chan *dchan, struct rio_dma_data *data, |