We already have a generic function sg_nents_for_len which does the same thing. This patch switches omap over to it and also adds error handling in case the SG list is short.
Signed-off-by: Herbert Xu <[email protected]> --- drivers/crypto/omap-aes.c | 16 ++++++++++------ drivers/crypto/omap-des.c | 14 ++++++++++---- 2 files changed, 20 insertions(+), 10 deletions(-) diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 8178632..4ab53a6 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -578,10 +578,12 @@ static int omap_aes_copy_sgs(struct omap_aes_dev *dd) sg_init_table(&dd->in_sgl, 1); sg_set_buf(&dd->in_sgl, buf_in, total); dd->in_sg = &dd->in_sgl; + dd->in_sg_len = 1; sg_init_table(&dd->out_sgl, 1); sg_set_buf(&dd->out_sgl, buf_out, total); dd->out_sg = &dd->out_sgl; + dd->out_sg_len = 1; return 0; } @@ -602,7 +604,6 @@ static int omap_aes_prepare_req(struct crypto_engine *engine, crypto_ablkcipher_reqtfm(req)); struct omap_aes_dev *dd = omap_aes_find_dev(ctx); struct omap_aes_reqctx *rctx; - int len; if (!dd) return -ENODEV; @@ -614,6 +615,14 @@ static int omap_aes_prepare_req(struct crypto_engine *engine, dd->in_sg = req->src; dd->out_sg = req->dst; + dd->in_sg_len = sg_nents_for_len(dd->in_sg, dd->total); + if (dd->in_sg_len < 0) + return dd->in_sg_len; + + dd->out_sg_len = sg_nents_for_len(dd->out_sg, dd->total); + if (dd->out_sg_len < 0) + return dd->out_sg_len; + if (omap_aes_check_aligned(dd->in_sg, dd->total) || omap_aes_check_aligned(dd->out_sg, dd->total)) { if (omap_aes_copy_sgs(dd)) @@ -623,11 +632,6 @@ static int omap_aes_prepare_req(struct crypto_engine *engine, dd->sgs_copied = 0; } - len = ALIGN(dd->total, AES_BLOCK_SIZE); - dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, len); - dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, len); - BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0); - rctx = ablkcipher_request_ctx(req); ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); rctx->mode &= FLAGS_MODE_MASK; diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c index 3eedb03..5691434 100644 --- a/drivers/crypto/omap-des.c +++ b/drivers/crypto/omap-des.c @@ -560,10 +560,12 @@ static int omap_des_copy_sgs(struct omap_des_dev *dd) sg_init_table(&dd->in_sgl, 1); sg_set_buf(&dd->in_sgl, buf_in, dd->total); dd->in_sg = &dd->in_sgl; + dd->in_sg_len = 1; sg_init_table(&dd->out_sgl, 1); sg_set_buf(&dd->out_sgl, buf_out, dd->total); dd->out_sg = &dd->out_sgl; + dd->out_sg_len = 1; return 0; } @@ -595,6 +597,14 @@ static int omap_des_prepare_req(struct crypto_engine *engine, dd->in_sg = req->src; dd->out_sg = req->dst; + dd->in_sg_len = sg_nents_for_len(dd->in_sg, dd->total); + if (dd->in_sg_len < 0) + return dd->in_sg_len; + + dd->out_sg_len = sg_nents_for_len(dd->out_sg, dd->total); + if (dd->out_sg_len < 0) + return dd->out_sg_len; + if (omap_des_copy_needed(dd->in_sg) || omap_des_copy_needed(dd->out_sg)) { if (omap_des_copy_sgs(dd)) @@ -604,10 +614,6 @@ static int omap_des_prepare_req(struct crypto_engine *engine, dd->sgs_copied = 0; } - dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, dd->total); - dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, dd->total); - BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0); - rctx = ablkcipher_request_ctx(req); ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); rctx->mode &= FLAGS_MODE_MASK; -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
