The patch titled
Subject: rapidio: fix return value description for dma_prep functions
has been added to the -mm tree. Its filename is
rapidio-fix-return-value-description-for-dma_prep-functions.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/rapidio-fix-return-value-description-for-dma_prep-functions.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/rapidio-fix-return-value-description-for-dma_prep-functions.patch
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------------------------------------------------------
From: Alexandre Bounine <alexandre.bounine@xxxxxxx>
Subject: rapidio: fix return value description for dma_prep functions
Update return value description for rio_dma_prep_... functions to include
error-valued pointer that can be returned by HW mport device drivers.
Return values from these functions must be checked using IS_ERR_OR_NULL
macro.
This patch is applicable to kernel versions starting from v4.6-rc1.
Link: http://lkml.kernel.org/r/1469125134-16523-4-git-send-email-alexandre.bounine@xxxxxxx
Signed-off-by: Alexandre Bounine <alexandre.bounine@xxxxxxx>
Cc: Matt Porter <mporter@xxxxxxxxxxxxxxxxxxx>
Cc: Andre van Herk <andre.van.herk@xxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: Barry Wood <barry.wood@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/rapidio/rio.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff -puN drivers/rapidio/rio.c~rapidio-fix-return-value-description-for-dma_prep-functions drivers/rapidio/rio.c
--- a/drivers/rapidio/rio.c~rapidio-fix-return-value-description-for-dma_prep-functions
+++ a/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,
_
Patches currently in -mm which might be from alexandre.bounine@xxxxxxx are
rapidio-add-rapidio-channelized-messaging-driver.patch
rapidio-documentation-fix-mangled-paragraph-in-mport_cdev.patch
rapidio-fix-return-value-description-for-dma_prep-functions.patch
rapidio-tsi721_dma-add-channel-mask-and-queue-size-parameters.patch
rapidio-tsi721-add-pcie-mrrs-override-parameter.patch
rapidio-tsi721-add-messaging-mbox-selector-parameter.patch
rapidio-tsi721_dma-advance-queue-processing-from-transfer-submit-call.patch
rapidio-fix-error-handling-in-mbox-request-release-functions.patch
rapidio-idt_gen2-fix-locking-warning.patch
rapidio-change-inbound-window-size-type-to-u64.patch
rapidio-modify-for-rev3-specification-changes.patch
powerpc-fsl_rio-apply-changes-for-rio-spec-rev-3.patch
rapidio-switches-add-driver-for-idt-gen3-switches.patch
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