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crypto: sahara - fix processing hash requests with req->nbytes < sg->length

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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: 5a2bb93f59 ("crypto: sahara - add support for SHA1/256")
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ovidiu Panait 2023-12-24 10:21:35 +02:00 committed by Herbert Xu
parent 5deff027fc
commit 7bafa74d1b
1 changed files with 4 additions and 1 deletions
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5
drivers/crypto/sahara.c
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@ -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);
}