Subject: Re: 2.6.33-rc3 regression: leds_alix2: can't allocate I/O for GPIO
From: Richard Purdie <rpurdie@rpsys.net>
To: Arnd Hannemann <hannemann@nets.rwth-aachen.de>,
       Daniel Mack <daniel@caiaq.de>
Cc: LKML <linux-kernel@vger.kernel.org>, linux-geode@lists.infradead.org
In-Reply-To: <4B45B6DD.4060903@nets.rwth-aachen.de>
References: <4B45B6DD.4060903@nets.rwth-aachen.de>
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Date: Thu, 07 Jan 2010 10:51:24 +0000
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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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