linux-kernel - Re: [PATCH -next] fs/btrfs: Fix unlocking in btrfs_ref_tree

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Message-ID: <SN4PR0401MB35985CFC199D20362EBFD8E09BBD0@SN4PR0401MB3598.namprd04.prod.outlook.com>
Date:   Fri, 15 May 2020 09:03:29 +0000
From:   Johannes Thumshirn <Johannes.Thumshirn@....com>
To:     Bo YU <tsu.yubo@...il.com>, "clm@...com" <clm@...com>,
        "josef@...icpanda.com" <josef@...icpanda.com>,
        "sterba@...e.com" <sterba@...e.com>
CC:     "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] fs/btrfs: Fix unlocking in btrfs_ref_tree_mod

On 15/05/2020 04:17, Bo YU wrote:
> It adds spin_lock() in add_block_entry() but out path does not unlock
> it.

Which call path doesn't unlock it? There is an out_unlock label with a 
spin_unlock() right above your insert. So either coverity messed something
up or the call path that needs the unlock has to jump to out_unlock instead
of out.