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-rw-r--r--drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c12
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;