From: Joel Fernandes Subject: [PATCH v2 03/14] crypto: omap-aes: Populate number of SG elements Date: Sat, 17 Aug 2013 21:42:24 -0500 Message-ID: <1376793755-30478-4-git-send-email-joelf@ti.com> References: <1376793755-30478-1-git-send-email-joelf@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Joel Fernandes , Linux OMAP List , Linux Kernel Mailing List , Linux ARM Kernel List , Linux Crypto Mailing List To: Herbert Xu , "David S. Miller" , Mark Greer , Tony Lindgren , Santosh Shilimkar , Rajendra Nayak , Lokesh Vutla Return-path: In-Reply-To: <1376793755-30478-1-git-send-email-joelf@ti.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org List-Id: linux-crypto.vger.kernel.org Crypto layer only passes nbytes but number of SG elements is needed for mapping or 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 26b802b..e369e6e 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -164,6 +164,8 @@ 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; @@ -731,6 +733,10 @@ 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