linux-kernel - Re: [BISECTED] pata_jmicron: no drives found on post 2.6.25 kernels

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Date:	Wed, 21 May 2008 21:45:23 +0200
From:	"Luca Tettamanti" <kronos.it@...il.com>
To:	"Shaohua Li" <shaohua.li@...el.com>
Cc:	"Plamen Petrov" <pvp-lsts@...ru.acad.bg>,
	linux-kernel@...r.kernel.org,
	"Jesse Barnes" <jbarnes@...tuousgeek.org>
Subject: Re: [BISECTED] pata_jmicron: no drives found on post 2.6.25 kernels

On Wed, May 21, 2008 at 10:58 AM, Shaohua Li <shaohua.li@...el.com> wrote:
> On Tue, 2008-05-20 at 19:09 +0300, Plamen Petrov wrote:
>> Shaohua Li написа:
>>
>> > On Tue, 2008-05-20 at 01:37 +0300, Plamen Petrov wrote:
>> >> Hello, folks!
>> >>
>> >> After 2.6.26 merge window opened, the optical drives in my
>> >> computer, hanging off a JMicron controler were not detected
>> >> by linux any more.
>> >>
>> >> Luca Tettamanti reported similar troubles:
>> >> http://marc.info/?l=linux-kernel&m=120958791323911&w=2
>> >>
>> >> Its been 20 days, so I decided to bisect.
>> >> git bisect revealed that commit
>> >> 7d715a6c1ae5785d00fb9a876b5abdfc43abc44b
>> >> is the one causing pata_jmicron to fail to detect drives,
>> >> connected to the JMicron controler on my motherboard.
>> >> At least in my case, anyway...
>> >> Changing kernel config to CONFIG_PCIEASPM=n makes the drives
>> >> attached to the JMicron SATA/PATA controller usable again.
>> > When you enable this option, did you change any ASPM policy? By default,
>> > we are using the BIOS setting, so it shouldn't change any thing.
>> >
>>
>> No, I did not change any ASPM policy, mainly because I do not how.
>>
>> > Also can you please send me the 'lspci -vvvxxxx' output with/without the
>> > ASPM enabled?
>> >
> Can you please try below patch?

I confirm that the patch fixes the issue when CONFIG_ASPM is enabled.

> The Slot 03:00.* of JMicron controller has two functions, but one is
> PCIE endpoint the other isn't PCIE device, very strange.

Right, that's what I'm seeing here (motherboard is an ASUS P5B-E). I'm
attaching the output of lspci.

thanks,
Luca

Download attachment "aspm" of type "application/octet-stream" (4048 bytes)

Download attachment "noaspm" of type "application/octet-stream" (4048 bytes)