From 10badea259fab2ec91a5e6bf1e568a01e4cb5263 Mon Sep 17 00:00:00 2001
From: Will Thomas <will.thomas@imgtec.com>
Date: Fri, 5 Aug 2016 14:00:14 +0100
Subject: crypto: img-hash - Fix null pointer exception

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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/crypto/img-hash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/crypto/img-hash.c')

diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c
index 68e8aa90fe01..e5c941bdc693 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);
-- 
cgit