From patchwork Mon Mar 9 22:38:22 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Jain X-Patchwork-Id: 5970231 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8C70F9F444 for ; Mon, 9 Mar 2015 17:14:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CE4A820225 for ; Mon, 9 Mar 2015 17:14:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DEB0220251 for ; Mon, 9 Mar 2015 17:14:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932070AbbCIROA (ORCPT ); Mon, 9 Mar 2015 13:14:00 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:20631 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752192AbbCIRKb (ORCPT ); Mon, 9 Mar 2015 13:10:31 -0400 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id t29HASWv021819 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 9 Mar 2015 17:10:29 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0021.oracle.com (8.13.8/8.13.8) with ESMTP id t29HAS8x029848 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 9 Mar 2015 17:10:28 GMT Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by aserv0121.oracle.com (8.13.8/8.13.8) with ESMTP id t29HASWF024178; Mon, 9 Mar 2015 17:10:28 GMT Received: from OL.sg.oracle.com (/10.186.101.34) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 09 Mar 2015 10:10:23 -0700 From: Anand Jain To: linux-btrfs@vger.kernel.org Cc: dsterba@suse.cz Subject: [PATCH 04/26] Btrfs: sysfs: fix, kobject pointer clean up needed after kobject release Date: Tue, 10 Mar 2015 06:38:22 +0800 Message-Id: <1425940724-7744-5-git-send-email-anand.jain@oracle.com> X-Mailer: git-send-email 2.0.0.153.g79dcccc In-Reply-To: <1425940724-7744-1-git-send-email-anand.jain@oracle.com> References: <1425940724-7744-1-git-send-email-anand.jain@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-3.9 required=5.0 tests=BAYES_00, DATE_IN_FUTURE_03_06, RCVD_IN_DNSWL_HI,T_RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Anand Jain The sysfs clean up self test like in the below code fails, since fs_info->device_dir_kobject still points to its stale kobject. Reseting this pointer will help to fix this. open_ctree() { ret = btrfs_sysfs_add_one(fs_info); :: + btrfs_sysfs_remove_one(fs_info); + ret = btrfs_sysfs_add_one(fs_info); + if (ret) { + pr_err("BTRFS: failed to init sysfs interface: %d\n", ret); + goto fail_block_groups; + } Signed-off-by: Anand Jain --- fs/btrfs/sysfs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index adfac3e..15fead2 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -525,6 +525,7 @@ void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info) btrfs_kobj_rm_device(fs_info, NULL); kobject_del(fs_info->device_dir_kobj); kobject_put(fs_info->device_dir_kobj); + fs_info->device_dir_kobj = NULL; addrm_unknown_feature_attrs(fs_info, false); sysfs_remove_group(&fs_info->super_kobj, &btrfs_feature_attr_group); __btrfs_sysfs_remove_one(fs_info);