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

[Plamen Petrov]

Shaohua Li ÐÐÐÐÑÐ: 

> On Tue, 2008-05-20 at 19:09 +0300, Plamen Petrov wrote:
> > Shaohua Li ÐÐÐÐÑÐ:  
> >
> > > 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?
> The Slot 03:00.* of JMicron controller has two functions, but one is
> PCIE endpoint the other isn't PCIE device, very strange. PCIE spec
> defines all functions should have the same config for ASPM, so disable
> ASPM for the whole slot in this case. 

With the provided patch applied on top of latest git tree, the optical
drive connected to the JMicron controller WORKS with CONFIG_PCIEASPM=y. 

Just in case - this is on a Gigabyte GA-P35-DS3R v2.1 motherboard,
BIOS F11. 

Thanks! 


Plamen Petrov, network & system administrator
Filial - Silistra
RU "Angel Kantchev"
http://fs.ru.acad.bg/
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