Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756023AbbHNSUV (ORCPT ); Fri, 14 Aug 2015 14:20:21 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:51103 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932421AbbHNRnK (ORCPT ); Fri, 14 Aug 2015 13:43:10 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Leonidas S. Barbosa" , Herbert Xu Subject: [PATCH 4.1 39/84] crypto: nx - Fixing NX data alignment with nx_sg list Date: Fri, 14 Aug 2015 10:42:07 -0700 Message-Id: <20150814174211.407548661@linuxfoundation.org> X-Mailer: git-send-email 2.5.0 In-Reply-To: <20150814174210.214822912@linuxfoundation.org> References: <20150814174210.214822912@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2981 Lines: 86 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Leonidas Da Silva Barbosa commit c3365ce130e50176533debe1cabebcdb8e61156c upstream. In NX we need to pass always a 16 multiple size nx_sg_list to co processor. Trim function handle with this assuring all nx_sg_lists are 16 multiple size, although data was not being considerated when crop was done. It was causing an unalignment between size of the list and data, corrupting csbcpb fields returning a -23 H_ST_PARM error, or invalid operation. This patch fix this recalculating how much data should be put back in to_process variable what assures the size of sg_list will be correct with size of the data. Signed-off-by: Leonidas S. Barbosa Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/nx/nx.c | 28 ++++++++++++++++++++++++---- 1 file changed, 24 insertions(+), 4 deletions(-) --- a/drivers/crypto/nx/nx.c +++ b/drivers/crypto/nx/nx.c @@ -215,8 +215,15 @@ struct nx_sg *nx_walk_and_build(struct n * @delta: is the amount we need to crop in order to bound the list. * */ -static long int trim_sg_list(struct nx_sg *sg, struct nx_sg *end, unsigned int delta) +static long int trim_sg_list(struct nx_sg *sg, + struct nx_sg *end, + unsigned int delta, + unsigned int *nbytes) { + long int oplen; + long int data_back; + unsigned int is_delta = delta; + while (delta && end > sg) { struct nx_sg *last = end - 1; @@ -228,7 +235,20 @@ static long int trim_sg_list(struct nx_s delta -= last->len; } } - return (sg - end) * sizeof(struct nx_sg); + + /* There are cases where we need to crop list in order to make it + * a block size multiple, but we also need to align data. In order to + * that we need to calculate how much we need to put back to be + * processed + */ + oplen = (sg - end) * sizeof(struct nx_sg); + if (is_delta) { + data_back = (abs(oplen) / AES_BLOCK_SIZE) * sg->len; + data_back = *nbytes - (data_back & ~(AES_BLOCK_SIZE - 1)); + *nbytes -= data_back; + } + + return oplen; } /** @@ -330,8 +350,8 @@ int nx_build_sg_lists(struct nx_crypto_c /* these lengths should be negative, which will indicate to phyp that * the input and output parameters are scatterlists, not linear * buffers */ - nx_ctx->op.inlen = trim_sg_list(nx_ctx->in_sg, nx_insg, delta); - nx_ctx->op.outlen = trim_sg_list(nx_ctx->out_sg, nx_outsg, delta); + nx_ctx->op.inlen = trim_sg_list(nx_ctx->in_sg, nx_insg, delta, nbytes); + nx_ctx->op.outlen = trim_sg_list(nx_ctx->out_sg, nx_outsg, delta, nbytes); return 0; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/