linux-kernel - Re: 2.6.33-rc3 regression: leds_alix2: can't allocate I/O for GPIO

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Message-Id: <1262861484.8493.14.camel@dax.rpnet.com>
Date:	Thu, 07 Jan 2010 10:51:24 +0000
From:	Richard Purdie <rpurdie@...ys.net>
To:	Arnd Hannemann <hannemann@...s.rwth-aachen.de>,
	Daniel Mack <daniel@...aq.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-geode@...ts.infradead.org
Subject: Re: 2.6.33-rc3 regression: leds_alix2: can't allocate I/O for GPIO

On Thu, 2010-01-07 at 11:26 +0100, Arnd Hannemann wrote:
> with 2.6.33-rc3 the LEDs are not working anymore on my Geode embedded board:
> If I remember correctly this was working fine with 2.6.32, but certainly with 2.6.31
> 
> relevant dmesg output of 2.6.33-rc3:
> 
> [    0.709643] cs5535_gpio: base=0x6100 mask=0xb003c66 major=253
> 
> [    2.207947] leds_alix2: system is recognized as "PC Engines ALIX.2 v0.99h"
> [    2.228678] leds_alix2: can't allocate I/O for GPIO
> 
> 
> For reference dmesg of 2.6.31.3:
> 
> [    0.611953] cs5535_gpio: base=0x6100 mask=0xb003c66 major=253
> 
> [    2.379114] leds_alix2: system is recognized as "PC Engines ALIX.2"
> [    2.399097] Registered led device: alix:1
> [    2.411404] Registered led device: alix:2
> [    2.423720] Registered led device: alix:3

Its likely to be commit 7f131cf3ed96c969d7b092bf629e25c3df50901e. It
looks like the request_region() call is failing. Daniel, any idea why?

Cheers,

Richard

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