From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Genoud <richard.genoud@gmail.com>
Subject: Re: [PATCH] tty/serial: atmel: use port->name as name in request_irq()
Date: Thu, 3 May 2018 14:36:03 +0200
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To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Rob Herring <robh@kernel.org>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Peter Hurley <peter@hurleysoftware.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-serial@vger.kernel.org, Jiri Slaby <jslaby@suse.com>, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org
List-Id: linux-serial@vger.kernel.org

On 02/05/2018 21:16, Sebastian Andrzej Siewior wrote:
> On 2018-04-27 12:31:52 [+0200], Richard Genoud wrote:
>> Hi Sebastian,
> Hi,
> 
>>> If this is unknown and a bisect is requested, please let me know.
>> Indeed, this will be appreciated.
>> I'm quite curious to find the commit that led to this.
> 
> commit 761ed4a94582ab291aa24dcbea4e01e8936488c8
> Author: Rob Herring <robh@kernel.org>
> Date:   Mon Aug 22 17:39:10 2016 -0500
> 
>     tty: serial_core: convert uart_close to use tty_port_close
>     
>     tty_port_close handles much of the common parts of tty close. Convert
>     uart_close to use it and move the serial_core specific parts into
>     tty_port.shutdown function. This will be needed to use tty_port functions
>     directly from in kernel clients.
>     
>     This change causes ops->stop_rx() to be called after uart_wait_until_sent()
>     is called which I think should be fine. Otherwise, the sequence of the
>     close should be the same.
>     
>     Cc: Peter Hurley <peter@hurleysoftware.com>
>     Signed-off-by: Rob Herring <robh@kernel.org>
>     Acked-by: Alan Cox <alan@linux.intel.com>
>     Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> 
> The thread starts at
>   https://www.spinics.net/lists/linux-serial/msg30070.html
>   http://lkml.kernel.org/r/20180426150625.q5tqcb7fzchvkb5d@linutronix.de

Thanks for this hunting session !
Could resend your patch with Fixes: in the commit message ?

BTW, I didn't manage to reproduce the behavior you describe, could you
give me your .config and describe a little more how you manage to
trigger this bug ?
(do you use the console on serial debug ? which board ? )


Thanks !