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[2/5] crypto: chelsio - check for sg null

Message ID 2bc173de2778088da18456c78b52bbe76dff67eb.1515669022.git.harsh@chelsio.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show

Commit Message

Harsh Jain Jan. 11, 2018, 11:15 a.m. UTC 
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>
---
 drivers/crypto/chelsio/chcr_algo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c
index f6b1161..280377f 100644
--- 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);