crypto: sahara - fix processing hash requests with req->nbytes < sg->length
[ 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: 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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -792,6 +792,7 @@ static int sahara_sha_hw_links_create(struct sahara_dev *dev,
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int start)
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int start)
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{
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{
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struct scatterlist *sg;
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struct scatterlist *sg;
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unsigned int len;
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unsigned int i;
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unsigned int i;
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int ret;
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int ret;
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@ -813,12 +814,14 @@ static int sahara_sha_hw_links_create(struct sahara_dev *dev,
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if (!ret)
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if (!ret)
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return -EFAULT;
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return -EFAULT;
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len = rctx->total;
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for (i = start; i < dev->nb_in_sg + start; i++) {
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for (i = start; i < dev->nb_in_sg + start; i++) {
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dev->hw_link[i]->len = sg->length;
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dev->hw_link[i]->len = min(len, sg->length);
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dev->hw_link[i]->p = sg->dma_address;
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dev->hw_link[i]->p = sg->dma_address;
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if (i == (dev->nb_in_sg + start - 1)) {
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if (i == (dev->nb_in_sg + start - 1)) {
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dev->hw_link[i]->next = 0;
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dev->hw_link[i]->next = 0;
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} else {
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} else {
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len -= min(len, sg->length);
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dev->hw_link[i]->next = dev->hw_phys_link[i + 1];
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dev->hw_link[i]->next = dev->hw_phys_link[i + 1];
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sg = sg_next(sg);
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sg = sg_next(sg);
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}
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}
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