dma_map_sg return 0 on error, it returns the number of
DMA address segments mapped (this may be shorter
than <nents> passed in if some elements of the scatter/gather
list are physically or virtually adjacent and an IOMMU maps
them with a single entry).
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: linux-crypto@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxx>
---
drivers/crypto/sahara.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c
index 457084b344c1..bb71aac30e2c 100644
--- a/drivers/crypto/sahara.c
+++ b/drivers/crypto/sahara.c
@@ -487,13 +487,13 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev)
ret = dma_map_sg(dev->device, dev->in_sg, dev->nb_in_sg,
DMA_TO_DEVICE);
- if (ret != dev->nb_in_sg) {
+ if (!ret) {
dev_err(dev->device, "couldn't map in sg\n");
goto unmap_in;
}
ret = dma_map_sg(dev->device, dev->out_sg, dev->nb_out_sg,
DMA_FROM_DEVICE);
- if (ret != dev->nb_out_sg) {
+ if (!ret) {
dev_err(dev->device, "couldn't map out sg\n");
goto unmap_out;
}
--
2.34.1
