linux-kernel - Re: [PATCHv5 1/7] tty: Drop tty->count on tty

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Message-ID: <20180918134150.GC23431@kroah.com>
Date:   Tue, 18 Sep 2018 15:41:50 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Dmitry Safonov <dima@...sta.com>
Cc:     linux-kernel@...r.kernel.org,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Daniel Axtens <dja@...ens.net>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Mark Rutland <mark.rutland@....com>,
        Michael Neuling <mikey@...ling.org>,
        Mikulas Patocka <mpatocka@...hat.com>,
        Nathan March <nathan@...net>,
        Pasi Kärkkäinen <pasik@....fi>,
        Peter Hurley <peter@...leysoftware.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rong, Chen" <rong.a.chen@...el.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Tan Xiaojun <tanxiaojun@...wei.com>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Jiri Slaby <jslaby@...e.cz>, Jiri Slaby <jslaby@...e.com>,
        stable@...r.kernel.org
Subject: Re: [PATCHv5 1/7] tty: Drop tty->count on tty_reopen() failure

On Tue, Sep 18, 2018 at 12:52:52AM +0100, 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))
> 
> Fixes: commit 892d1fa7eaae ("tty: Destroy ldisc instance on hangup")
> 

Minor nit, no need to have "commit" in this line, it's implied.

Also, no need to put an extra line here either.

I'll queue this patch up now, have some question about the rest...

thanks,

greg k-h