linux-kernel - Re: [BUG] gma500: sleeping function called from invalid context at kernel/mutex.c:413

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Message-ID: <CAMeQTsY2PcNhOmgVzK0XOs+HD1jr+JyZ+fZ5Yzj-v8yt9wmvRg@mail.gmail.com>
Date:	Wed, 13 Nov 2013 17:56:51 +0100
From:	Patrik Jakobsson <patrik.r.jakobsson@...il.com>
To:	Holger Schurig <holgerschurig@...il.com>
Cc:	David Airlie <airlied@...ux.ie>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] gma500: sleeping function called from invalid context at kernel/mutex.c:413

On Wed, Nov 13, 2013 at 4:49 PM, Holger Schurig <holgerschurig@...il.com> wrote:
> Kernel: 3.10.19
>
> From time to time, when I booted, I had a completely dark screen (with
> kernel command line quiet) and a non-blinking cursor. I wondered if
> that was perhaps gma500. So I turned on various debug checks. Then
> I've got the BUG from the subject.
>
> The device is a " VGA compatible controller [0300]: Intel Corporation
> System Controller Hub (SCH Poulsbo) Graphics Controller [8086:8108]
> (rev 07)".
>
> Here's relevant "dmesg" output:
>
> ...

Hi

We're calling backlight_update_status() in IRQ context which isn't allowed.

I'll add it to my todo list.

Thanks
Patrik
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