diff options
Diffstat (limited to 'drivers/crypto/sunxi-ss/sun4i-ss-hash.c')
| -rw-r--r-- | drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c index a4b5ff2b72f8..d2b6d89aad28 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * sun4i-ss-hash.c - hardware cryptographic accelerator for Allwinner A20 SoC * @@ -6,11 +7,6 @@ * This file add support for MD5 and SHA1. * * You could find the datasheet in Documentation/arm/sunxi/README - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #include "sun4i-ss.h" #include <linux/scatterlist.h> @@ -240,7 +236,10 @@ static int sun4i_hash(struct ahash_request *areq) } } else { /* Since we have the flag final, we can go up to modulo 4 */ - end = ((areq->nbytes + op->len) / 4) * 4 - op->len; + if (areq->nbytes < 4) + end = 0; + else + end = ((areq->nbytes + op->len) / 4) * 4 - op->len; } /* TODO if SGlen % 4 and !op->len then DMA */ |