diff options
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c index 315a62e424d6..74b4e910a38d 100644 --- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c +++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c @@ -27,6 +27,7 @@ static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq) struct scatterlist *sg; struct skcipher_alg *alg = crypto_skcipher_alg(tfm); struct sun8i_ce_alg_template *algt; + unsigned int todo, len; algt = container_of(alg, struct sun8i_ce_alg_template, alg.skcipher); @@ -51,28 +52,35 @@ static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq) return true; } + len = areq->cryptlen; sg = areq->src; while (sg) { if (!IS_ALIGNED(sg->offset, sizeof(u32))) { algt->stat_fb_srcali++; return true; } - if (sg->length % 4) { + todo = min(len, sg->length); + if (todo % 4) { algt->stat_fb_srclen++; return true; } + len -= todo; sg = sg_next(sg); } + + len = areq->cryptlen; sg = areq->dst; while (sg) { if (!IS_ALIGNED(sg->offset, sizeof(u32))) { algt->stat_fb_dstali++; return true; } - if (sg->length % 4) { + todo = min(len, sg->length); + if (todo % 4) { algt->stat_fb_dstlen++; return true; } + len -= todo; sg = sg_next(sg); } return false; |