Commit c149e476 authored by Corentin Labbe's avatar Corentin Labbe Committed by Herbert Xu
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crypto: sun8i-ss - handle zero sized sg 



sun8i-ss does not handle well the possible zero sized sg.

Fixes: d9b45418 ("crypto: sun8i-ss - support hash algorithms")
Signed-off-by: default avatarCorentin Labbe <clabbe@baylibre.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 359e893e

drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c

+9 −1
Original line number Diff line number Diff line
@@ -380,13 +380,21 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq) 
	}



	len = areq->nbytes;

	for_each_sg(areq->src, sg, nr_sgs, i) {

	sg = areq->src;

	i = 0;

	while (len > 0 && sg) {

		if (sg_dma_len(sg) == 0) {

			sg = sg_next(sg);

			continue;

		}

		rctx->t_src[i].addr = sg_dma_address(sg);

		todo = min(len, sg_dma_len(sg));

		rctx->t_src[i].len = todo / 4;

		len -= todo;

		rctx->t_dst[i].addr = addr_res;

		rctx->t_dst[i].len = digestsize / 4;

		sg = sg_next(sg);

		i++;

	}

	if (len > 0) {

		dev_err(ss->dev, "remaining len %d\n", len);