linux-kernel - Re: [KERNEL 2.6.26-rc4] bugreport : pata

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Date:	Sat, 14 Jun 2008 03:20:41 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Komuro <komurojun-mbn@...ty.com>
CC:	Tejun Heo <htejun@...il.com>,
	Dominik Brodowski <linux@...inikbrodowski.net>,
	jgarzik@...hat.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-pcmcia <linux-pcmcia@...ts.infradead.org>,
	Kristoffer Ericson <kristoffer.ericson@...il.com>
Subject: Re: [KERNEL 2.6.26-rc4]  bugreport : pata_pcmcia with Sandisk Extreme
 III 8GB

Komuro wrote:
> Dear Tejun
> 
>>>>>> pcmcia: registering new device pcmcia1.1
>>>>>> 1.1: GetNextTuple: No more items
>>>>>> pata_pcmcia: probe of 1.1 failed with error -12
> 
> The patch "libata: kill hotplug related race condition"
> introduced the pata_pcmcia error.
> 
> Please fix this problem.
> 
> 
> Best Regards
> Komuro
> 
>>> f046519fc85a8fdf6a058b4ac9d897cdee6f3e52 is first bad commit
> commit f046519fc85a8fdf6a058b4ac9d897cdee6f3e52
> Author: Tejun Heo <htejun@...il.com>
> Date:   Mon May 19 01:15:08 2008 +0900
> 
>     libata: kill hotplug related race condition
>     
>     Originally, whole reset processing was done while the port is frozen
>     and SError was cleared during @postreset().  This had two race
>     conditions.  1: hotplug could occur after reset but before SError is
>     cleared and libata won't know about it.  2: hotplug could occur after
>     all the reset is complete but before the port is thawed.  As all
>     events are cleared on thaw, the hotplug event would be lost.

Interesting!  Thanks for the diagnosis...

	Jeff



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