linux-kernel - Re: [PATCH] serial: ifx6x60: fix paging fault on spi_register

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Message-ID: <20120807111339.4a369066@pyramind.ukuu.org.uk>
Date:	Tue, 7 Aug 2012 11:13:39 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alan Cox <alan@...ux.intel.com>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org, Russ Gorby <russ.gorby@...el.com>
Subject: Re: [PATCH] serial: ifx6x60: fix paging fault on
 spi_register_driver

On Tue, 7 Aug 2012 13:12:47 +0800
Fengguang Wu <fengguang.wu@...el.com> wrote:

> [  117.240866] BUG: unable to handle kernel paging request at 815b627c
> [  117.240866] IP: [<813fe94b>] spi_register_driver+0xb/0x50
> ...
> [  117.240866] Call Trace:
> [  117.240866]  [<817de977>] ifx_spi_init+0xbe/0xf0
> 
> The root cause is, spi_register_driver() is trying to write into the
> passed *const* struct spi_driver.
> 
> Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>

Acked-by: Alan Cox <alan@...ux.intel.com>
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