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crypto: sahara - fix AES descriptor create 

The AES implementation still assumes, that the hw_desc[0] has a valid
key as long as no new key needs to be set; consequentialy it always
sets the AES key header for the first descriptor and puts data into
the second one (hw_desc[1]).

Change this to only update the key in the hardware, when a new key is
to be set and use the first descriptor for data otherwise.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Steffen Trumtrar 2015-04-07 17:13:42 +02:00 committed by Herbert Xu
parent ddacc621f6
commit 1711045fb1
1 changed files with 18 additions and 14 deletions
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32
drivers/crypto/sahara.c
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@ -479,6 +479,7 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev)
struct scatterlist *sg;
int ret;
int i, j;
int idx = 0;
/* Copy new key if necessary */
if (ctx->flags & FLAGS_NEW_KEY) {
@ -486,17 +487,20 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev)
ctx->flags &= ~FLAGS_NEW_KEY;
if (dev->flags & FLAGS_CBC) {
dev->hw_desc[0]->len1 = AES_BLOCK_SIZE;
dev->hw_desc[0]->p1 = dev->iv_phys_base;
dev->hw_desc[idx]->len1 = AES_BLOCK_SIZE;
dev->hw_desc[idx]->p1 = dev->iv_phys_base;
} else {
dev->hw_desc[0]->len1 = 0;
dev->hw_desc[0]->p1 = 0;
dev->hw_desc[idx]->len1 = 0;
dev->hw_desc[idx]->p1 = 0;
}
dev->hw_desc[0]->len2 = ctx->keylen;
dev->hw_desc[0]->p2 = dev->key_phys_base;
dev->hw_desc[0]->next = dev->hw_phys_desc[1];
dev->hw_desc[idx]->len2 = ctx->keylen;
dev->hw_desc[idx]->p2 = dev->key_phys_base;
dev->hw_desc[idx]->next = dev->hw_phys_desc[1];
dev->hw_desc[idx]->hdr = sahara_aes_key_hdr(dev);
idx++;
}
dev->hw_desc[0]->hdr = sahara_aes_key_hdr(dev);
dev->nb_in_sg = sahara_sg_length(dev->in_sg, dev->total);
dev->nb_out_sg = sahara_sg_length(dev->out_sg, dev->total);
@ -520,7 +524,7 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev)
}
/* Create input links */
dev->hw_desc[1]->p1 = dev->hw_phys_link[0];
dev->hw_desc[idx]->p1 = dev->hw_phys_link[0];
sg = dev->in_sg;
for (i = 0; i < dev->nb_in_sg; i++) {
dev->hw_link[i]->len = sg->length;
@ -534,7 +538,7 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev)
}
/* Create output links */
dev->hw_desc[1]->p2 = dev->hw_phys_link[i];
dev->hw_desc[idx]->p2 = dev->hw_phys_link[i];
sg = dev->out_sg;
for (j = i; j < dev->nb_out_sg + i; j++) {
dev->hw_link[j]->len = sg->length;
@ -548,10 +552,10 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev)
}
/* Fill remaining fields of hw_desc[1] */
dev->hw_desc[1]->hdr = sahara_aes_data_link_hdr(dev);
dev->hw_desc[1]->len1 = dev->total;
dev->hw_desc[1]->len2 = dev->total;
dev->hw_desc[1]->next = 0;
dev->hw_desc[idx]->hdr = sahara_aes_data_link_hdr(dev);
dev->hw_desc[idx]->len1 = dev->total;
dev->hw_desc[idx]->len2 = dev->total;
dev->hw_desc[idx]->next = 0;
sahara_dump_descriptors(dev);
sahara_dump_links(dev);