From: Joel Fernandes Subject: [PATCH 03/10] crypto: omap-aes: Populate number of SG elements Date: Wed, 14 Aug 2013 18:12:42 -0500 Message-ID: <1376521969-16807-4-git-send-email-joelf@ti.com> References: <1376521969-16807-1-git-send-email-joelf@ti.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Linux OMAP List , Linux ARM Kernel List , Linux Kernel Mailing List , Linux Crypto Mailing List , Joel Fernandes To: Herbert Xu , "David S. Miller" , Mark Greer , Tony Lindgren , Santosh Shilimkar , Rajendra Nayak , Lokesh Vutla Return-path: Received: from arroyo.ext.ti.com ([192.94.94.40]:39228 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933268Ab3HNXNi (ORCPT ); Wed, 14 Aug 2013 19:13:38 -0400 In-Reply-To: <1376521969-16807-1-git-send-email-joelf@ti.com> Sender: linux-crypto-owner@vger.kernel.org List-ID: Crypto layer only passes nbytes but number of SG elements is needed for mapping/unmapping SGs at one time using dma_map* API and also needed to pass in for dmaengine prep function. We call function added to scatterwalk for this purpose in omap_aes_handle_queue to populate the values which are used later. Signed-off-by: Joel Fernandes --- drivers/crypto/omap-aes.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 3838e0a..b7189a8 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -171,6 +171,8 @@ struct omap_aes_dev { void *buf_out; int dma_out; struct dma_chan *dma_lch_out; + int in_sg_len; + int out_sg_len; dma_addr_t dma_addr_out; const struct omap_aes_pdata *pdata; @@ -741,6 +743,10 @@ static int omap_aes_handle_queue(struct omap_aes_dev *dd, dd->out_offset = 0; dd->out_sg = req->dst; + 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; -- 1.7.9.5