From patchwork Tue Jul 5 05:50:07 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sajjan, Vikas C" X-Patchwork-Id: 9213677 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 DEA416048F for ; Tue, 5 Jul 2016 05:55:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D1B14288C1 for ; Tue, 5 Jul 2016 05:55:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C6615288CC; Tue, 5 Jul 2016 05:55:58 +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 5D1FC288C1 for ; Tue, 5 Jul 2016 05:55:58 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 84B151A1E43; Mon, 4 Jul 2016 22:56:37 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from g2t2353.austin.hpe.com (g2t2353.austin.hpe.com [15.233.44.26]) (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 14BE31A1E43 for ; Mon, 4 Jul 2016 22:56:36 -0700 (PDT) Received: from dctxvm241.in.rdlabs.hpecorp.net (dctxvm241.in.rdlabs.hpecorp.net [15.146.152.172]) by g2t2353.austin.hpe.com (Postfix) with ESMTP id 26FCB55; Tue, 5 Jul 2016 05:55:52 +0000 (UTC) From: Vikas C Sajjan To: dan.j.williams@intel.com, jthumshirn@suse.de Subject: [PATCH] dax: use devm_add_action_or_reset() Date: Tue, 5 Jul 2016 11:20:07 +0530 Message-Id: <1467697807-27067-1-git-send-email-vikas.cha.sajjan@hpe.com> X-Mailer: git-send-email 1.9.1 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-acpi@vger.kernel.org, Vikas C Sajjan , linux-nvdimm@lists.01.org MIME-Version: 1.0 Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP If devm_add_action() fails, we are explicitly calling the cleanup to free the resources allocated. Use the helper devm_add_action_or_reset() and return directly in case of error, since the cleanup function has been already called by the helper if there was any error. Reported-by: Sudip Mukherjee Signed-off-by: Vikas C Sajjan Reviewed-by: Johannes Thumshirn --- drivers/dax/dax.c | 6 ++---- drivers/dax/pmem.c | 14 ++++++-------- 2 files changed, 8 insertions(+), 12 deletions(-) diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c index b891a12..803f395 100644 --- a/drivers/dax/dax.c +++ b/drivers/dax/dax.c @@ -211,11 +211,9 @@ int devm_create_dax_dev(struct dax_region *dax_region, struct resource *res, } dax_dev->dev = dev; - rc = devm_add_action(dax_region->dev, unregister_dax_dev, dev); - if (rc) { - unregister_dax_dev(dev); + rc = devm_add_action_or_reset(dax_region->dev, unregister_dax_dev, dev); + if (rc) return rc; - } return 0; diff --git a/drivers/dax/pmem.c b/drivers/dax/pmem.c index 55d510e..dfb1685 100644 --- a/drivers/dax/pmem.c +++ b/drivers/dax/pmem.c @@ -102,21 +102,19 @@ static int dax_pmem_probe(struct device *dev) if (rc) return rc; - rc = devm_add_action(dev, dax_pmem_percpu_exit, &dax_pmem->ref); - if (rc) { - dax_pmem_percpu_exit(&dax_pmem->ref); + rc = devm_add_action_or_reset(dev, dax_pmem_percpu_exit, + &dax_pmem->ref); + if (rc) return rc; - } addr = devm_memremap_pages(dev, &res, &dax_pmem->ref, altmap); if (IS_ERR(addr)) return PTR_ERR(addr); - rc = devm_add_action(dev, dax_pmem_percpu_kill, &dax_pmem->ref); - if (rc) { - dax_pmem_percpu_kill(&dax_pmem->ref); + rc = devm_add_action_or_reset(dev, dax_pmem_percpu_kill, + &dax_pmem->ref); + if (rc) return rc; - } nd_region = to_nd_region(dev->parent); dax_region = alloc_dax_region(dev, nd_region->id, &res,