From patchwork Sun Jul 10 03:25:27 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 9222249 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 5DDB360890 for ; Sun, 10 Jul 2016 03:27:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 536AF284FE for ; Sun, 10 Jul 2016 03:27:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4812C285D0; Sun, 10 Jul 2016 03:27:40 +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=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 06965284FE for ; Sun, 10 Jul 2016 03:27:40 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 1A68F1A1E21; Sat, 9 Jul 2016 20:28:23 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by ml01.01.org (Postfix) with ESMTP id 071EC1A1E21 for ; Sat, 9 Jul 2016 20:28:22 -0700 (PDT) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP; 09 Jul 2016 20:27:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,339,1464678000"; d="scan'208";a="732018339" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.14]) by FMSMGA003.fm.intel.com with ESMTP; 09 Jul 2016 20:27:38 -0700 Subject: [PATCH v2 11/17] libnvdimm, pmem: flush posted-write queues on shutdown From: Dan Williams To: linux-nvdimm@lists.01.org Date: Sat, 09 Jul 2016 20:25:27 -0700 Message-ID: <146812112775.32932.16750910979264437016.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <146812106839.32932.2870621200867047059.stgit@dwillia2-desk3.amr.corp.intel.com> References: <146812106839.32932.2870621200867047059.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fsdevel@vger.kernel.org, linux-acpi@vger.kernel.org, hch@lst.de, linux-kernel@vger.kernel.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP Commit writes to media on system shutdown or pmem driver unload. Signed-off-by: Dan Williams --- drivers/nvdimm/bus.c | 16 ++++++++++++++++ drivers/nvdimm/pmem.c | 8 ++++++++ include/linux/nd.h | 1 + 3 files changed, 25 insertions(+) diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index e4882e63bece..1cc7880320fe 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -136,6 +136,21 @@ static int nvdimm_bus_remove(struct device *dev) return rc; } +static void nvdimm_bus_shutdown(struct device *dev) +{ + struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); + struct nd_device_driver *nd_drv = NULL; + + if (dev->driver) + nd_drv = to_nd_device_driver(dev->driver); + + if (nd_drv && nd_drv->shutdown) { + nd_drv->shutdown(dev); + dev_dbg(&nvdimm_bus->dev, "%s.shutdown(%s)\n", + dev->driver->name, dev_name(dev)); + } +} + void nd_device_notify(struct device *dev, enum nvdimm_event event) { device_lock(dev); @@ -214,6 +229,7 @@ static struct bus_type nvdimm_bus_type = { .match = nvdimm_bus_match, .probe = nvdimm_bus_probe, .remove = nvdimm_bus_remove, + .shutdown = nvdimm_bus_shutdown, }; static ASYNC_DOMAIN_EXCLUSIVE(nd_async_domain); diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 18cd95719da0..3f3fdb9586b9 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -351,9 +351,16 @@ static int nd_pmem_remove(struct device *dev) { if (is_nd_btt(dev)) nvdimm_namespace_detach_btt(to_nd_btt(dev)); + nvdimm_flush(to_nd_region(dev->parent)); + return 0; } +static void nd_pmem_shutdown(struct device *dev) +{ + nvdimm_flush(to_nd_region(dev->parent)); +} + static void nd_pmem_notify(struct device *dev, enum nvdimm_event event) { struct pmem_device *pmem = dev_get_drvdata(dev); @@ -393,6 +400,7 @@ static struct nd_device_driver nd_pmem_driver = { .probe = nd_pmem_probe, .remove = nd_pmem_remove, .notify = nd_pmem_notify, + .shutdown = nd_pmem_shutdown, .drv = { .name = "nd_pmem", }, diff --git a/include/linux/nd.h b/include/linux/nd.h index aee2761d294c..1ecd64643512 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -26,6 +26,7 @@ struct nd_device_driver { unsigned long type; int (*probe)(struct device *dev); int (*remove)(struct device *dev); + void (*shutdown)(struct device *dev); void (*notify)(struct device *dev, enum nvdimm_event event); };