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authorJoel Fernandes <joelf@ti.com>2013-08-18 06:42:24 +0400
committerHerbert Xu <herbert@gondor.apana.org.au>2013-08-21 15:27:59 +0400
commite77c756eca76077032db23d8d4b85dcd743742b4 (patch)
tree33f55e0e38d5aab727cb52d6c23f5e6bed781ecf /drivers/crypto
parent016af9b5c51e58ecda573f14dabe85a67363b20f (diff)
downloadlinux-e77c756eca76077032db23d8d4b85dcd743742b4.tar.xz
crypto: omap-aes - Populate number of SG elements
Crypto layer only passes nbytes but number of SG elements is needed for mapping or unmapping SGs at one time using dma_map* API and also needed to pass in for dmaengine prep function. We call function added to scatterwalk for this purpose in omap_aes_handle_queue to populate the values which are used later. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/omap-aes.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index e5b2120a12b9..1cad12ef4f55 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -165,6 +165,8 @@ struct omap_aes_dev {
void *buf_out;
int dma_out;
struct dma_chan *dma_lch_out;
+ int in_sg_len;
+ int out_sg_len;
dma_addr_t dma_addr_out;
const struct omap_aes_pdata *pdata;
@@ -725,6 +727,10 @@ static int omap_aes_handle_queue(struct omap_aes_dev *dd,
dd->out_offset = 0;
dd->out_sg = req->dst;
+ dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, dd->total);
+ dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, dd->total);
+ 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;