From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 02E28C433F5 for ; Wed, 3 Nov 2021 23:04:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DA85B611C9 for ; Wed, 3 Nov 2021 23:04:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230168AbhKCXH2 (ORCPT ); Wed, 3 Nov 2021 19:07:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229698AbhKCXH1 (ORCPT ); Wed, 3 Nov 2021 19:07:27 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 099AFC061714; Wed, 3 Nov 2021 16:04:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=kKuyk0it+UywLX6eUgF3vZCrnbiGfSWFOUp8zvmSh8Y=; b=ef+fiMlfjhcpLl5jo5UAKF90Kq 4KQ7KFuiNUPNTJEDK4bIAkRkcyl5A+wU1UZWABknExtJUr9ixhyG/bN+j09cY/BnbSgP2ytqwiA8u 3ZiI8+DmPVVSzLewpnp0hd/tJucz9qWcsqPMb50DQqNEeIja0AUndbF71NjNu/YeSYN/GACPfILjV 4ZRSFo3zfxGgoBSo0melaer5gp9te525rvvVqvqS6r1/x9dJTN6cZ/QDyDR6R5V+set3m+6RUJoZ9 Xspmt0hfZXlDvTC7qpDcv30QanDV5odiaBAGN3HSJ+LPnocJDVXHhlzk64qRzYB0qbDlltgo2u5SO EGdiJv5Q==; Received: from mcgrof by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1miPJ8-006seR-J4; Wed, 03 Nov 2021 23:04:38 +0000 From: Luis Chamberlain To: axboe@kernel.dk, hch@lst.de, penguin-kernel@i-love.sakura.ne.jp, dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com, ira.weiny@intel.com, richard@nod.at, miquel.raynal@bootlin.com, vigneshr@ti.com, efremov@linux.com, song@kernel.org, martin.petersen@oracle.com, hare@suse.de, jack@suse.cz, ming.lei@redhat.com, tj@kernel.org, mcgrof@kernel.org Cc: linux-mtd@lists.infradead.org, linux-scsi@vger.kernel.org, linux-raid@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 04/14] nvdimm/blk: add error handling support for add_disk() Date: Wed, 3 Nov 2021 16:04:27 -0700 Message-Id: <20211103230437.1639990-5-mcgrof@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211103230437.1639990-1-mcgrof@kernel.org> References: <20211103230437.1639990-1-mcgrof@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: Luis Chamberlain Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org We never checked for errors on add_disk() as this function returned void. Now that this is fixed, use the shiny new error handling. Since nvdimm/blk uses devm we just need to move the devm registration towards the end. And in hindsight, that seems to also provide a fix given del_gendisk() should not be called unless the disk was already added via add_disk(). The probably of that issue happening is low though, like OOM while calling devm_add_action(), so the fix is minor. We manually unwind in case of add_disk() failure prior to the devm registration. Reviewed-by: Dan Williams Reviewed-by: Christoph Hellwig Signed-off-by: Luis Chamberlain --- drivers/nvdimm/blk.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c index 4eef67918a7e..228c33b8d1d6 100644 --- a/drivers/nvdimm/blk.c +++ b/drivers/nvdimm/blk.c @@ -264,7 +264,9 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk) } set_capacity(disk, available_disk_size >> SECTOR_SHIFT); - device_add_disk(dev, disk, NULL); + rc = device_add_disk(dev, disk, NULL); + if (rc) + goto out_before_devm_err; /* nd_blk_release_disk() is called if this fails */ if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk)) -- 2.33.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C6FDC433F5 for ; Wed, 3 Nov 2021 23:05:33 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 70FFF604DC for ; Wed, 3 Nov 2021 23:05:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 70FFF604DC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ALcpOsC4OeCZkKaiMXMlDDSzVVPrGYhW7rClJawUVrk=; b=o4dqMRDKH91/tL zTLScrdVAsZtHbX4uhDAGv7r7mj0GH8IdfR4Xb9iosBPt9LHYQd5dDbTX8xCC4ceHXEbggxNIW9Ep y5eJ6fKW7EezjBWm9lV7PbcQjiKHRdHQw0twS90ejhPnK0DT3HHN7VCEKNL8axc5Vi3md00lJOYJM Xx3VvULgrOOa+dsM268kkUcT1ytrGwHkPF2yeuWDJDDUYhVnzSud27P040snUn5yI902f7xziZD1v eHjZzWJfjW+HB9hfblGOiA18HPw0kPSzwpVLrUw90qmrLisraZAWgLgYD7l2t+OaZawS5APClBIw6 xMGUW2hsSfvk1N2YxAog==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1miPJW-006t0O-9k; Wed, 03 Nov 2021 23:05:02 +0000 Received: from mcgrof by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1miPJ8-006seR-J4; Wed, 03 Nov 2021 23:04:38 +0000 From: Luis Chamberlain To: axboe@kernel.dk, hch@lst.de, penguin-kernel@i-love.sakura.ne.jp, dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com, ira.weiny@intel.com, richard@nod.at, miquel.raynal@bootlin.com, vigneshr@ti.com, efremov@linux.com, song@kernel.org, martin.petersen@oracle.com, hare@suse.de, jack@suse.cz, ming.lei@redhat.com, tj@kernel.org, mcgrof@kernel.org Cc: linux-mtd@lists.infradead.org, linux-scsi@vger.kernel.org, linux-raid@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 04/14] nvdimm/blk: add error handling support for add_disk() Date: Wed, 3 Nov 2021 16:04:27 -0700 Message-Id: <20211103230437.1639990-5-mcgrof@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211103230437.1639990-1-mcgrof@kernel.org> References: <20211103230437.1639990-1-mcgrof@kernel.org> MIME-Version: 1.0 X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org We never checked for errors on add_disk() as this function returned void. Now that this is fixed, use the shiny new error handling. Since nvdimm/blk uses devm we just need to move the devm registration towards the end. And in hindsight, that seems to also provide a fix given del_gendisk() should not be called unless the disk was already added via add_disk(). The probably of that issue happening is low though, like OOM while calling devm_add_action(), so the fix is minor. We manually unwind in case of add_disk() failure prior to the devm registration. Reviewed-by: Dan Williams Reviewed-by: Christoph Hellwig Signed-off-by: Luis Chamberlain --- drivers/nvdimm/blk.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c index 4eef67918a7e..228c33b8d1d6 100644 --- a/drivers/nvdimm/blk.c +++ b/drivers/nvdimm/blk.c @@ -264,7 +264,9 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk) } set_capacity(disk, available_disk_size >> SECTOR_SHIFT); - device_add_disk(dev, disk, NULL); + rc = device_add_disk(dev, disk, NULL); + if (rc) + goto out_before_devm_err; /* nd_blk_release_disk() is called if this fails */ if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk)) -- 2.33.0 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/