linux-kernel - Re: [PATCH] serial: ifx6x60: Add modem power off function in the platform reboot process

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Message-ID: <20121122110857.2f7c9804@bob.linux.org.uk>
Date:	Thu, 22 Nov 2012 11:08:57 +0000
From:	Alan Cox <alan@...ux.intel.com>
To:	Jun Chen <jun.d.chen@...el.com>
Cc:	Bi Chao <chao.bi@...el.com>, serial <linux-serial@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"russ.gorby" <russ.gorby@...el.com>
Subject: Re: [PATCH] serial: ifx6x60: Add modem power off function in the
 platform reboot process

On Thu, 22 Nov 2012 06:19:23 -0500
Jun Chen <jun.d.chen@...el.com> wrote:

> 
> This patch add modem power off function in the reboot process
> according registering reboot callback to the reboot_notifier_list.
> Also realizing the spi shutdown function.

Need to unregister the reboot notifier in the ifx_spi_exit path. If the
driver module is unloaded you leave the callback present and the kernel
will call into freed memory.

Alan
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