From aca8bf0027d3ab4492d47e6b05b13911948903db Mon Sep 17 00:00:00 2001
From: Tero Kristo <t-kristo@ti.com>
Date: Tue, 5 Nov 2019 16:01:10 +0200
Subject: [PATCH] crypto: omap-des - handle NULL cipher request

If no data is provided for DES request, just return immediately. No
processing is needed in this case.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/crypto/omap-des.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c
index 31fc9300b990f..8eda433192040 100644
--- a/drivers/crypto/omap-des.c
+++ b/drivers/crypto/omap-des.c
@@ -637,6 +637,9 @@ static int omap_des_crypt(struct skcipher_request *req, unsigned long mode)
 		 !!(mode & FLAGS_ENCRYPT),
 		 !!(mode & FLAGS_CBC));
 
+	if (!req->cryptlen)
+		return 0;
+
 	if (!IS_ALIGNED(req->cryptlen, DES_BLOCK_SIZE))
 		return -EINVAL;
 
-- 
2.30.2