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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>
This commit is contained in:
Joel Fernandes 2013-08-17 21:42:24 -05:00 committed by Herbert Xu
parent 016af9b5c5
commit e77c756eca
1 changed files with 6 additions and 0 deletions
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6
drivers/crypto/omap-aes.c
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@ -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;