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crypto: sahara - Fix error check for dma_map_sg

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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@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jack Wang 2022-08-19 08:07:50 +02:00 committed by Herbert Xu
parent 545665ad1e
commit 66f0b6b7d8
1 changed files with 2 additions and 2 deletions
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4
drivers/crypto/sahara.c
View file

@ -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;
}