summaryrefslogtreecommitdiff
path: root/drivers/crypto/omap-aes.c
diff options
context:
space:
mode:
authorHerbert Xu <herbert@gondor.apana.org.au>2016-07-12 08:17:52 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2016-07-18 12:35:48 +0300
commit7c001a8650e67cb293120044c3f62756258ed27c (patch)
tree3e9746ad358e23a0380f38a5a11005927951e4da /drivers/crypto/omap-aes.c
parent3a01d0ee2b991c8c267620e63a4ab47cd8c30cc4 (diff)
downloadlinux-7c001a8650e67cb293120044c3f62756258ed27c.tar.xz
crypto: omap - Stop using crypto scatterwalk_bytes_sglen
We already have a generic function sg_nents_for_len which does the same thing. This patch switches omap over to it and also adds error handling in case the SG list is short. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/omap-aes.c')
-rw-r--r--drivers/crypto/omap-aes.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index 8178632de788..4ab53a604312 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -578,10 +578,12 @@ static int omap_aes_copy_sgs(struct omap_aes_dev *dd)
sg_init_table(&dd->in_sgl, 1);
sg_set_buf(&dd->in_sgl, buf_in, total);
dd->in_sg = &dd->in_sgl;
+ dd->in_sg_len = 1;
sg_init_table(&dd->out_sgl, 1);
sg_set_buf(&dd->out_sgl, buf_out, total);
dd->out_sg = &dd->out_sgl;
+ dd->out_sg_len = 1;
return 0;
}
@@ -602,7 +604,6 @@ static int omap_aes_prepare_req(struct crypto_engine *engine,
crypto_ablkcipher_reqtfm(req));
struct omap_aes_dev *dd = omap_aes_find_dev(ctx);
struct omap_aes_reqctx *rctx;
- int len;
if (!dd)
return -ENODEV;
@@ -614,6 +615,14 @@ static int omap_aes_prepare_req(struct crypto_engine *engine,
dd->in_sg = req->src;
dd->out_sg = req->dst;
+ dd->in_sg_len = sg_nents_for_len(dd->in_sg, dd->total);
+ if (dd->in_sg_len < 0)
+ return dd->in_sg_len;
+
+ dd->out_sg_len = sg_nents_for_len(dd->out_sg, dd->total);
+ if (dd->out_sg_len < 0)
+ return dd->out_sg_len;
+
if (omap_aes_check_aligned(dd->in_sg, dd->total) ||
omap_aes_check_aligned(dd->out_sg, dd->total)) {
if (omap_aes_copy_sgs(dd))
@@ -623,11 +632,6 @@ static int omap_aes_prepare_req(struct crypto_engine *engine,
dd->sgs_copied = 0;
}
- len = ALIGN(dd->total, AES_BLOCK_SIZE);
- dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, len);
- dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, len);
- BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0);
-
rctx = ablkcipher_request_ctx(req);
ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req));
rctx->mode &= FLAGS_MODE_MASK;