linux-kernel - Re: [PATCH] tty: serial: imx: move del_timer

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Date:	Mon, 26 Dec 2011 10:00:18 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Eric Miao <eric.miao@...aro.org>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Shawn Guo <shawn.guo@...aro.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [PATCH] tty: serial: imx: move del_timer_sync() to avoid
 potential deadlock

On Fri, Dec 23, 2011 at 05:39:27AM +0800, Eric Miao wrote:
> del_timer_sync() acquires its own lock and doesn't have to be nested
> within the spinlock of sport->port.lock in imx_set_termios(),  which
> will cause potential deadlock.  Fix this by moving it outside.
> 
> Cc: Fabio Estevam <fabio.estevam@...escale.com>
> Cc: Shawn Guo <shawn.guo@...aro.org>
> Cc: Sascha Hauer <s.hauer@...gutronix.de>
> Cc: Greg Kroah-Hartman <gregkh@...e.de>
> Signed-off-by: Eric Miao <eric.miao@...aro.org>

I queued this for 3.3, and will send a pull-request to Greg.

-- 
Regards,
Shawn

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