diff mbox series

[4.19,158/229] mailbox: bcm-ferxrm-mailbox: Fix error check for dma_map_sg

Message ID 20221024113004.114523680@linuxfoundation.org
State New
Headers
Series None |

Commit Message

Greg KH Oct. 24, 2022, 11:31 a.m. UTC 
  From: Jack Wang <jinpu.wang@ionos.com>

[ Upstream commit 6b207ce8a96a71e966831e3a13c38143ba9a73c1 ]

dma_map_sg return 0 on error, fix the error check, and return -EIO
to caller.

Fixes: dbc049eee730 ("mailbox: Add driver for Broadcom FlexRM ring manager")
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/mailbox/bcm-flexrm-mailbox.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/mailbox/bcm-flexrm-mailbox.c b/drivers/mailbox/bcm-flexrm-mailbox.c
index 96bcabfebc23..543c4a4a8fca 100644
--- a/drivers/mailbox/bcm-flexrm-mailbox.c
+++ b/drivers/mailbox/bcm-flexrm-mailbox.c
@@ -634,15 +634,15 @@  static int flexrm_spu_dma_map(struct device *dev, struct brcm_message *msg)
 
 	rc = dma_map_sg(dev, msg->spu.src, sg_nents(msg->spu.src),
 			DMA_TO_DEVICE);
-	if (rc < 0)
-		return rc;
+	if (!rc)
+		return -EIO;
 
 	rc = dma_map_sg(dev, msg->spu.dst, sg_nents(msg->spu.dst),
 			DMA_FROM_DEVICE);
-	if (rc < 0) {
+	if (!rc) {
 		dma_unmap_sg(dev, msg->spu.src, sg_nents(msg->spu.src),
 			     DMA_TO_DEVICE);
-		return rc;
+		return -EIO;
 	}
 
 	return 0;