From patchwork Tue Nov 26 08:40:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 11261621 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A096513A4 for ; Tue, 26 Nov 2019 08:40:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8ABE120722 for ; Tue, 26 Nov 2019 08:40:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726504AbfKZIkJ (ORCPT ); Tue, 26 Nov 2019 03:40:09 -0500 Received: from mx2.suse.de ([195.135.220.15]:48200 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726049AbfKZIkJ (ORCPT ); Tue, 26 Nov 2019 03:40:09 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 366DFAE87; Tue, 26 Nov 2019 08:40:08 +0000 (UTC) From: Johannes Thumshirn To: David Sterba Cc: Nikolay Borisov , Qu Wenruo , Linux BTRFS Mailinglist , Johannes Thumshirn Subject: [PATCH v4 1/2] btrfs: decrement number of open devices after closing the device not before Date: Tue, 26 Nov 2019 09:40:05 +0100 Message-Id: <20191126084006.23262-2-jthumshirn@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20191126084006.23262-1-jthumshirn@suse.de> References: <20191126084006.23262-1-jthumshirn@suse.de> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org In btrfs_close_one_device we're decrementing the number of open devices before we're calling btrfs_close_bdev(). As there is no intermediate exit between these points in this function it is technically OK to do so, but it makes the code a bit harder to understand. Move both operations closer together and move the decrement step after btrfs_close_bdev(). Signed-off-by: Johannes Thumshirn Reviewed-by: Qu Wenruo --- fs/btrfs/volumes.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index d8e5560db285..2398b071bcf6 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1067,9 +1067,6 @@ static void btrfs_close_one_device(struct btrfs_device *device) struct btrfs_device *new_device; struct rcu_string *name; - if (device->bdev) - fs_devices->open_devices--; - if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) && device->devid != BTRFS_DEV_REPLACE_DEVID) { list_del_init(&device->dev_alloc_list); @@ -1080,6 +1077,8 @@ static void btrfs_close_one_device(struct btrfs_device *device) fs_devices->missing_devices--; btrfs_close_bdev(device); + if (device->bdev) + fs_devices->open_devices--; new_device = btrfs_alloc_device(NULL, &device->devid, device->uuid);