From patchwork Tue Apr 25 18:20:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 9699149 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 DFFD4601D3 for ; Tue, 25 Apr 2017 18:28:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D02D82841D for ; Tue, 25 Apr 2017 18:28:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C46B528459; Tue, 25 Apr 2017 18:28:38 +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 67EA82841D for ; Tue, 25 Apr 2017 18:28:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1953026AbdDYS2e (ORCPT ); Tue, 25 Apr 2017 14:28:34 -0400 Received: from ale.deltatee.com ([207.54.116.67]:49846 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1952433AbdDYSV2 (ORCPT ); Tue, 25 Apr 2017 14:21:28 -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 1d355O-0004KN-04; Tue, 25 Apr 2017 12:21:22 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.84_2) (envelope-from ) id 1d355M-0005sE-Kd; Tue, 25 Apr 2017 12:21:12 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-nvdimm@lists.01.org, linux-scsi@vger.kernel.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, dm-devel@redhat.com Cc: Christoph Hellwig , "Martin K. Petersen" , "James E.J. Bottomley" , Jens Axboe , Greg Kroah-Hartman , Dan Williams , Ross Zwisler , Matthew Wilcox , Sumit Semwal , Stephen Bates , Logan Gunthorpe , Herbert Xu , "David S. Miller" Date: Tue, 25 Apr 2017 12:20:53 -0600 Message-Id: <1493144468-22493-7-git-send-email-logang@deltatee.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1493144468-22493-1-git-send-email-logang@deltatee.com> References: <1493144468-22493-1-git-send-email-logang@deltatee.com> X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-nvdimm@lists.01.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, dm-devel@redhat.com, hch@lst.de, martin.petersen@oracle.com, jejb@linux.vnet.ibm.com, axboe@kernel.dk, gregkh@linuxfoundation.org, dan.j.williams@intel.com, ross.zwisler@linux.intel.com, mawilcox@microsoft.com, sumit.semwal@linaro.org, sbates@raithlin.com, logang@deltatee.com, herbert@gondor.apana.org.au, davem@davemloft.net X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v2 06/21] crypto: hifn_795x: 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 Conversion of a couple kmap_atomic instances to the sg_map helper function. However, it looks like there was a bug in the original code: the source scatter lists offset (t->offset) was passed to ablkcipher_get which added it to the destination address. This doesn't make a lot of sense, but t->offset is likely always zero anyway. So, this patch cleans that brokeness up. Also, a change to the error path: if ablkcipher_get failed, everything seemed to proceed as if it hadn't. Setting 'error' should hopefully clear that up. Signed-off-by: Logan Gunthorpe Cc: Herbert Xu Cc: "David S. Miller" --- drivers/crypto/hifn_795x.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c index e09d405..34b1870 100644 --- a/drivers/crypto/hifn_795x.c +++ b/drivers/crypto/hifn_795x.c @@ -1619,7 +1619,7 @@ static int hifn_start_device(struct hifn_device *dev) return 0; } -static int ablkcipher_get(void *saddr, unsigned int *srestp, unsigned int offset, +static int ablkcipher_get(void *saddr, unsigned int *srestp, struct scatterlist *dst, unsigned int size, unsigned int *nbytesp) { unsigned int srest = *srestp, nbytes = *nbytesp, copy; @@ -1632,15 +1632,17 @@ static int ablkcipher_get(void *saddr, unsigned int *srestp, unsigned int offset while (size) { copy = min3(srest, dst->length, size); - daddr = kmap_atomic(sg_page(dst)); - memcpy(daddr + dst->offset + offset, saddr, copy); - kunmap_atomic(daddr); + daddr = sg_map(dst, 0, SG_KMAP_ATOMIC); + if (IS_ERR(daddr)) + return PTR_ERR(daddr); + + memcpy(daddr, saddr, copy); + sg_unmap(dst, daddr, 0, SG_KMAP_ATOMIC); nbytes -= copy; size -= copy; srest -= copy; saddr += copy; - offset = 0; pr_debug("%s: copy: %u, size: %u, srest: %u, nbytes: %u.\n", __func__, copy, size, srest, nbytes); @@ -1671,11 +1673,12 @@ static inline void hifn_complete_sa(struct hifn_device *dev, int i) static void hifn_process_ready(struct ablkcipher_request *req, int error) { + int err; struct hifn_request_context *rctx = ablkcipher_request_ctx(req); if (rctx->walk.flags & ASYNC_FLAGS_MISALIGNED) { unsigned int nbytes = req->nbytes; - int idx = 0, err; + int idx = 0; struct scatterlist *dst, *t; void *saddr; @@ -1695,17 +1698,24 @@ static void hifn_process_ready(struct ablkcipher_request *req, int error) continue; } - saddr = kmap_atomic(sg_page(t)); + saddr = sg_map(t, 0, SG_KMAP_ATOMIC); + if (IS_ERR(saddr)) { + if (!error) + error = PTR_ERR(saddr); + break; + } + + err = ablkcipher_get(saddr, &t->length, + dst, nbytes, &nbytes); + sg_unmap(t, saddr, 0, SG_KMAP_ATOMIC); - err = ablkcipher_get(saddr, &t->length, t->offset, - dst, nbytes, &nbytes); if (err < 0) { - kunmap_atomic(saddr); + if (!error) + error = err; break; } idx += err; - kunmap_atomic(saddr); } hifn_cipher_walk_exit(&rctx->walk);