linux-kernel - Re: BUG: unable to handle kernel paging request in usb_match

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Message-ID: <CACVXFVO0TYHP0=GZVo1cz_FdxXSbX-xQ8vwrwUrZ2Y0nj7yDzg@mail.gmail.com>
Date:	Fri, 17 Aug 2012 20:16:15 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	Bjørn Mork <bjorn@...k.no>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Oliver Neukum <oneukum@...e.de>,
	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"Lan, Tianyu" <tianyu.lan@...el.com>
Subject: Re: BUG: unable to handle kernel paging request in usb_match_id()

On Fri, Aug 17, 2012 at 6:24 PM, Fengguang Wu <fengguang.wu@...el.com> wrote:
> On Fri, Aug 17, 2012 at 05:27:08PM +0800, Fengguang Wu wrote:
>> Hi Bjørn,
>>
>> > -static const struct usb_device_id id_table[] __devinitconst = {
>> > +static const struct usb_device_id id_table[] = {
>>
>> Good catch! It magically fixed the oops. So that id_table was
>> freed sometime with __devinitconst?
>>
>> There are some more "usb_device_id .* __devinitconst" users in the system,
>> Shall they be fixed as well?

The issue should be triggered only when HOTPLUG is not set.

But,  if HOTPLUG is not enabled, should device_add() trigger driver probe
further after kernel init is completed?  Or even devices should be allowed
to add into system?



Thanks,
-- 
Ming Lei
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