linux-kernel - Re: [PATCH] ACPI battery: Fix sysfs oops when removing battery

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Message-ID: <20101221072309.GA32278@liondog.tnic>
Date:	Tue, 21 Dec 2010 08:23:09 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Seblu <seblu@...lu.net>
Cc:	Zhang Rui <rui.zhang@...el.com>,
	"Brown, Len" <len.brown@...el.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI battery: Fix sysfs oops when removing battery

On Tue, Dec 21, 2010 at 04:24:26AM +0100, Seblu wrote:
> On Tue, Dec 21, 2010 at 3:01 AM, Zhang Rui <rui.zhang@...el.com> wrote:
> > On Sun, 2010-12-19 at 21:00 +0800, Borislav Petkov wrote:
> >> Hi guys,
> >>
> >> I get the oops below on 37-rc6. Here's a possible fix:
> >>
> > does this happen every time when you unload the battery driver?
> >
> on my laptop (dell e6410), with 4 tests, this append every times.

Yes, it happens every time here too. The explanation for that is simple:
according to the oops, this is on the path of acpi_ev_notify_dispatch()
which looks like it handles ACPI events and since removing the battery
or changing of the power supply or similar is one such event, we do a
state update.

-- 
Regards/Gruss,
    Boris.
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