crypto: chelsio - check for sg null

Add warning message if sg is NULL after skipping bytes.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c
index f6b1161..280377f 100644 (file)
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -574,7 +574,8 @@ static void  ulptx_walk_add_sg(struct ulptx_walk *walk,
                        skip = 0;
                }
        }
-       if (walk->nents == 0) {
+       WARN(!sg, "SG should not be null here\n");
+       if (sg && (walk->nents == 0)) {
                small = min_t(unsigned int, sg_dma_len(sg) - skip_len, len);
                sgmin = min_t(unsigned int, small, CHCR_SRC_SG_SIZE);
                walk->sgl->len0 = cpu_to_be32(sgmin);