From patchwork Thu Apr 13 22:05:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 9680297 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 2F2A760387 for ; Thu, 13 Apr 2017 22:14:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2124C2864C for ; Thu, 13 Apr 2017 22:14:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 15A1528173; Thu, 13 Apr 2017 22:14:00 +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 B3FA628658 for ; Thu, 13 Apr 2017 22:13:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755888AbdDMWNz (ORCPT ); Thu, 13 Apr 2017 18:13:55 -0400 Received: from ale.deltatee.com ([207.54.116.67]:38226 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753284AbdDMWGa (ORCPT ); Thu, 13 Apr 2017 18:06:30 -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 1cymsJ-0003tk-CP; Thu, 13 Apr 2017 16:06:05 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.84_2) (envelope-from ) id 1cymsI-0001CL-0a; Thu, 13 Apr 2017 16:05:58 -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 16:05:35 -0600 Message-Id: <1492121135-4437-23-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 22/22] memstick: 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 Straightforward conversion, but we have to WARN if unmappable memory finds its way into the sgl. Signed-off-by: Logan Gunthorpe --- drivers/memstick/host/jmb38x_ms.c | 23 ++++++++++++++++++----- drivers/memstick/host/tifm_ms.c | 22 +++++++++++++++++----- 2 files changed, 35 insertions(+), 10 deletions(-) diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c index 48db922..256cf41 100644 --- a/drivers/memstick/host/jmb38x_ms.c +++ b/drivers/memstick/host/jmb38x_ms.c @@ -303,7 +303,6 @@ static int jmb38x_ms_transfer_data(struct jmb38x_ms_host *host) unsigned int off; unsigned int t_size, p_cnt; unsigned char *buf; - struct page *pg; unsigned long flags = 0; if (host->req->long_data) { @@ -318,14 +317,26 @@ static int jmb38x_ms_transfer_data(struct jmb38x_ms_host *host) unsigned int uninitialized_var(p_off); if (host->req->long_data) { - pg = nth_page(sg_page(&host->req->sg), - off >> PAGE_SHIFT); p_off = offset_in_page(off); p_cnt = PAGE_SIZE - p_off; p_cnt = min(p_cnt, length); local_irq_save(flags); - buf = kmap_atomic(pg) + p_off; + buf = sg_map_offset(&host->req->sg, + off - host->req->sg.offset, + SG_KMAP_ATOMIC); + if (IS_ERR(buf)) { + /* + * This should really never happen unless + * the code is changed to use memory that is + * not mappable in the sg. Seeing there doesn't + * seem to be any error path out of here, + * we can only WARN. + */ + WARN(1, "Non-mappable memory used in sg!"); + break; + } + } else { buf = host->req->data + host->block_pos; p_cnt = host->req->data_len - host->block_pos; @@ -341,7 +352,9 @@ static int jmb38x_ms_transfer_data(struct jmb38x_ms_host *host) : jmb38x_ms_read_reg_data(host, buf, p_cnt); if (host->req->long_data) { - kunmap_atomic(buf - p_off); + sg_unmap_offset(&host->req->sg, buf, + off - host->req->sg.offset, + SG_KMAP_ATOMIC); local_irq_restore(flags); } diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c index 7bafa72..c0bc40e 100644 --- a/drivers/memstick/host/tifm_ms.c +++ b/drivers/memstick/host/tifm_ms.c @@ -186,7 +186,6 @@ static unsigned int tifm_ms_transfer_data(struct tifm_ms *host) unsigned int off; unsigned int t_size, p_cnt; unsigned char *buf; - struct page *pg; unsigned long flags = 0; if (host->req->long_data) { @@ -203,14 +202,25 @@ static unsigned int tifm_ms_transfer_data(struct tifm_ms *host) unsigned int uninitialized_var(p_off); if (host->req->long_data) { - pg = nth_page(sg_page(&host->req->sg), - off >> PAGE_SHIFT); p_off = offset_in_page(off); p_cnt = PAGE_SIZE - p_off; p_cnt = min(p_cnt, length); local_irq_save(flags); - buf = kmap_atomic(pg) + p_off; + buf = sg_map_offset(&host->req->sg, + off - host->req->sg.offset, + SG_KMAP_ATOMIC); + if (IS_ERR(buf)) { + /* + * This should really never happen unless + * the code is changed to use memory that is + * not mappable in the sg. Seeing there doesn't + * seem to be any error path out of here, + * we can only WARN. + */ + WARN(1, "Non-mappable memory used in sg!"); + break; + } } else { buf = host->req->data + host->block_pos; p_cnt = host->req->data_len - host->block_pos; @@ -221,7 +231,9 @@ static unsigned int tifm_ms_transfer_data(struct tifm_ms *host) : tifm_ms_read_data(host, buf, p_cnt); if (host->req->long_data) { - kunmap_atomic(buf - p_off); + sg_unmap_offset(&host->req->sg, buf, + off - host->req->sg.offset, + SG_KMAP_ATOMIC); local_irq_restore(flags); }