From patchwork Thu Apr 13 22:05:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 9680215 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CC66B60381 for ; Thu, 13 Apr 2017 22:10:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BE584285F4 for ; Thu, 13 Apr 2017 22:10:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B2E522864C; Thu, 13 Apr 2017 22:10:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4A5DE285F4 for ; Thu, 13 Apr 2017 22:10:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752986AbdDMWGx (ORCPT ); Thu, 13 Apr 2017 18:06:53 -0400 Received: from ale.deltatee.com ([207.54.116.67]:38152 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751808AbdDMWGZ (ORCPT ); Thu, 13 Apr 2017 18:06:25 -0400 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1cymsH-0003te-G7; Thu, 13 Apr 2017 16:06:00 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.84_2) (envelope-from ) id 1cymsG-0001BD-Ef; Thu, 13 Apr 2017 16:05:56 -0600 From: Logan Gunthorpe To: Christoph Hellwig , "Martin K. Petersen" , Sagi Grimberg , Jens Axboe , Tejun Heo , Greg Kroah-Hartman , Dan Williams , Ross Zwisler , Matthew Wilcox , Sumit Semwal , Ming Lin , linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, intel-gfx@lists.freedesktop.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-nvme@lists.infradead.org, linux-nvdimm@lists.01.org, linux-scsi@vger.kernel.org, fcoe-devel@open-fcoe.org, open-iscsi@googlegroups.com, megaraidlinux.pdl@broadcom.com, sparmaintainer@unisys.com, devel@driverdev.osuosl.org, target-devel@vger.kernel.org, netdev@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com Cc: Steve Wise , Stephen Bates , Logan Gunthorpe Date: Thu, 13 Apr 2017 16:05:21 -0600 Message-Id: <1492121135-4437-9-git-send-email-logang@deltatee.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1492121135-4437-1-git-send-email-logang@deltatee.com> References: <1492121135-4437-1-git-send-email-logang@deltatee.com> X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: hch@lst.de, martin.petersen@oracle.com, sagi@grimberg.me, axboe@kernel.dk, tj@kernel.org, gregkh@linuxfoundation.org, dan.j.williams@intel.com, ross.zwisler@linux.intel.com, mawilcox@microsoft.com, sumit.semwal@linaro.org, ming.l@ssi.samsung.com, linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-nvme@lists.infradead.org, linux-nvdimm@lists.01.org, fcoe-devel@open-fcoe.org, open-iscsi@googlegroups.com, megaraidlinux.pdl@broadcom.com, sparmaintainer@unisys.com, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-media@vger.kernel.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, netdev@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, swise@opengridcomputing.com, sbates@raithlin.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH 08/22] crypto: chcr: Make use of the new sg_map helper function X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: target-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The get_page in this area looks *highly* suspect due to there being no corresponding put_page. However, I've left that as is to avoid breaking things. I've also removed the KMAP_ATOMIC_ARGS check as it appears to be dead code that dates back to when it was first committed... Signed-off-by: Logan Gunthorpe --- drivers/crypto/chelsio/chcr_algo.c | 28 +++++++++++++++------------- 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c index 41bc7f4..a993d1d 100644 --- a/drivers/crypto/chelsio/chcr_algo.c +++ b/drivers/crypto/chelsio/chcr_algo.c @@ -1489,22 +1489,21 @@ static struct sk_buff *create_authenc_wr(struct aead_request *req, return ERR_PTR(-EINVAL); } -static void aes_gcm_empty_pld_pad(struct scatterlist *sg, - unsigned short offset) +static int aes_gcm_empty_pld_pad(struct scatterlist *sg, + unsigned short offset) { - struct page *spage; unsigned char *addr; - spage = sg_page(sg); - get_page(spage); /* so that it is not freed by NIC */ -#ifdef KMAP_ATOMIC_ARGS - addr = kmap_atomic(spage, KM_SOFTIRQ0); -#else - addr = kmap_atomic(spage); -#endif - memset(addr + sg->offset, 0, offset + 1); + get_page(sg_page(sg)); /* so that it is not freed by NIC */ + + addr = sg_map(sg, SG_KMAP_ATOMIC); + if (IS_ERR(addr)) + return PTR_ERR(addr); + + memset(addr, 0, offset + 1); + sg_unmap(sg, addr, SG_KMAP_ATOMIC); - kunmap_atomic(addr); + return 0; } static int set_msg_len(u8 *block, unsigned int msglen, int csize) @@ -1940,7 +1939,10 @@ static struct sk_buff *create_gcm_wr(struct aead_request *req, if (req->cryptlen) { write_sg_to_skb(skb, &frags, src, req->cryptlen); } else { - aes_gcm_empty_pld_pad(req->dst, authsize - 1); + err = aes_gcm_empty_pld_pad(req->dst, authsize - 1); + if (err) + goto dstmap_fail; + write_sg_to_skb(skb, &frags, reqctx->dst, crypt_len); }