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>

diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c
index 31fc930..8eda433 100644 (file)
--- 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;