From patchwork Fri Jun 9 20:24:45 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 9779217 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 F0A4B60352 for ; Fri, 9 Jun 2017 20:31:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E34AC286F9 for ; Fri, 9 Jun 2017 20:31:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D82CA28704; Fri, 9 Jun 2017 20:31:15 +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 F3D41286F9 for ; Fri, 9 Jun 2017 20:31:14 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 609C321967BEC; Fri, 9 Jun 2017 13:30:04 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 3280D21A143F1 for ; Fri, 9 Jun 2017 13:30:03 -0700 (PDT) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga105.jf.intel.com with ESMTP; 09 Jun 2017 13:31:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,319,1493708400"; d="scan'208";a="97673443" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.125]) by orsmga002.jf.intel.com with ESMTP; 09 Jun 2017 13:31:13 -0700 Subject: [PATCH v3 11/14] libnvdimm, pmem: fix persistence warning From: Dan Williams To: linux-nvdimm@lists.01.org Date: Fri, 09 Jun 2017 13:24:45 -0700 Message-ID: <149703988577.20620.8733947188044045259.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <149703982465.20620.14881139332926778446.stgit@dwillia2-desk3.amr.corp.intel.com> References: <149703982465.20620.14881139332926778446.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: 2.1.22 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jan Kara , Matthew Wilcox , x86@kernel.org, dm-devel@redhat.com, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org, hch@lst.de Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP The pmem driver assumes if platform firmware describes the memory devices associated with a persistent memory range and CONFIG_ARCH_HAS_PMEM_API=y that it has all the mechanism necessary to flush data to a power-fail safe zone. We warn if the firmware does not describe memory devices, but we also need to warn if the architecture does not claim pmem support. Cc: Jan Kara Cc: Jeff Moyer Cc: Christoph Hellwig Cc: Matthew Wilcox Cc: Ross Zwisler Signed-off-by: Dan Williams --- drivers/nvdimm/region_devs.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 3c06a6ea6958..41b4cdf5dea8 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -1037,8 +1037,9 @@ int nvdimm_has_flush(struct nd_region *nd_region) { int i; - /* no nvdimm == flushing capability unknown */ - if (nd_region->ndr_mappings == 0) + /* no nvdimm or pmem api == flushing capability unknown */ + if (nd_region->ndr_mappings == 0 + || !IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API)) return -ENXIO; for (i = 0; i < nd_region->ndr_mappings; i++) {