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@xxxxxx>
---
drivers/crypto/omap-aes.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index 26b802b..e369e6e 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -164,6 +164,8 @@ 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;
@@ -731,6 +733,10 @@ 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;
--
1.7.9.5
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