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Subject: Re: [PATCHv2 1/4] tty: Drop tty->count on tty_reopen() failure
To:     Dmitry Safonov <dima@arista.com>, linux-kernel@vger.kernel.org
Cc:     Daniel Axtens <dja@axtens.net>,
        Dmitry Safonov <0x7f454c46@gmail.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Nathan March <nathan@gt.net>,
        Tan Xiaojun <tanxiaojun@huawei.com>,
        Peter Hurley <peter@hurleysoftware.com>,
        Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
        =?UTF-8?B?UGFzaSBLw6Rya2vDpGluZW4=?= <pasik@iki.fi>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Michael Neuling <mikey@neuling.org>,
        Mikulas Patocka <mpatocka@redhat.com>, stable@vger.kernel.org
References: <20180903165257.29227-1-dima@arista.com>
 <20180903165257.29227-2-dima@arista.com>
From:   Jiri Slaby <jslaby@suse.cz>
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Message-ID: <bd424937-4be9-43cd-d162-0294834987ff@suse.cz>
Date:   Tue, 4 Sep 2018 10:58:54 +0200
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On 09/03/2018, 06:52 PM, Dmitry Safonov wrote:
> In case of tty_ldisc_reinit() failure, tty->count should be decremented
> back, otherwise we will never release_tty().
> Tetsuo reported that it fixes noisy warnings on tty release like:
>   pts pts4033: tty_release: tty->count(10529) != (#fd's(7) + #kopen's(0))
> 
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Jiri Slaby <jslaby@suse.com>
> Cc: stable@vger.kernel.org # v4.6+
> Fixes: commit 892d1fa7eaae ("tty: Destroy ldisc instance on hangup")
> Tested-by: Jiri Slaby <jslaby@suse.com>

Reviewed-by: Jiri Slaby <jslaby@suse.cz>

> Tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
> Signed-off-by: Dmitry Safonov <dima@arista.com>

thanks,
-- 
js
suse labs