4.19-stable review patch. If anyone has any objections, please let me know.
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From: Ovidiu Panait ovidiu.panait@windriver.com
[ Upstream commit 7bafa74d1ba35dcc173e1ce915e983d65905f77e ]
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@windriver.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- 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 c69016faff6f..79e0ad0f7d26 100644 --- a/drivers/crypto/sahara.c +++ b/drivers/crypto/sahara.c @@ -796,6 +796,7 @@ static int sahara_sha_hw_links_create(struct sahara_dev *dev, int start) { struct scatterlist *sg; + unsigned int len; unsigned int i; int ret;
@@ -817,12 +818,14 @@ 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); }