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[v2,1/7] crypto: img-hash - Fix null pointer exception

Message ID 1470402020-10774-2-git-send-email-will.thomas@imgtec.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show

Commit Message

Will Thomas Aug. 5, 2016, 1 p.m. UTC 
Sporadic null pointer exceptions came from here. Fix them.

Signed-off-by: Will Thomas <will.thomas@imgtec.com>
Reviewed-by: James Hartley <james.hartley@imgtec.com>
---
 drivers/crypto/img-hash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c
index 68e8aa9..e5c941b 100644
--- a/drivers/crypto/img-hash.c
+++ b/drivers/crypto/img-hash.c
@@ -361,7 +361,7 @@  static void img_hash_dma_task(unsigned long d)
 	size_t nbytes, bleft, wsend, len, tbc;
 	struct scatterlist tsg;
 
-	if (!ctx->sg)
+	if (!hdev->req || !ctx->sg)
 		return;
 
 	addr = sg_virt(ctx->sg);