From: Ovidiu Panait <ovidiu.panait@xxxxxxxxxxxxx>
It's not always the case that the entire sg entry needs to be processed.
Currently, when nbytes is less than sg->length, "Descriptor length" errors
are encountered.
To fix this, take the actual request size into account when populating the
hw links.
Fixes: 5a2bb93f5992 ("crypto: sahara - add support for SHA1/256")
Signed-off-by: Ovidiu Panait <ovidiu.panait@xxxxxxxxxxxxx>
---
drivers/crypto/sahara.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c
index d49659db6a48..321c11050457 100644
--- a/drivers/crypto/sahara.c
+++ b/drivers/crypto/sahara.c
@@ -774,6 +774,7 @@ static int sahara_sha_hw_links_create(struct sahara_dev *dev,
int start)
{
struct scatterlist *sg;
+ unsigned int len;
unsigned int i;
int ret;
@@ -795,12 +796,14 @@ static int sahara_sha_hw_links_create(struct sahara_dev *dev,
if (!ret)
return -EFAULT;
+ len = rctx->total;
for (i = start; i < dev->nb_in_sg + start; i++) {
- dev->hw_link[i]->len = sg->length;
+ dev->hw_link[i]->len = min(len, sg->length);
dev->hw_link[i]->p = sg->dma_address;
if (i == (dev->nb_in_sg + start - 1)) {
dev->hw_link[i]->next = 0;
} else {
+ len -= min(len, sg->length);
dev->hw_link[i]->next = dev->hw_phys_link[i + 1];
sg = sg_next(sg);
}
--
2.34.1
