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mailbox: bcm-ferxrm-mailbox: Fix error check for dma_map_sg

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[ Upstream commit 6b207ce8a9 ]

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

Fixes: dbc049eee7 ("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>
This commit is contained in:
Jack Wang 2022-08-26 12:13:35 +02:00 committed by Greg Kroah-Hartman
parent b8fcd9ab0f
commit 25a4fb0e1a
1 changed files with 4 additions and 4 deletions
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8
drivers/mailbox/bcm-flexrm-mailbox.c
View File

@ -632,15 +632,15 @@ 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;