2.6.32-rc1/2, arm and usb
Mikael Pettersson
mikpe at it.uu.se
Wed Sep 30 09:18:55 EDT 2009
Arnaud Patard (Rtp) writes:
> Mikael Pettersson <mikpe at it.uu.se> writes:
>
> Hi,
>
> > Arnaud Patard (Rtp) writes:
> > > I wanted yesterday to check that my iop sanmina support was still fine on
> > > latest -rc kernel and found out that it was not booting anymore and last
> > > thing printed on the serial console is "done. Booting the kernel". After
> > > bisecting, the culprit is commit
> > > db8be50c4307dac2b37305fc59c8dc0f978d09ea (in linus tree). Reverting it
> > > allows to boot so this confirms the git bisect result.
> > >
> > > The commit does this in drivers/usb/host/pci-quirks.c :
> > > -DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, quirk_usb_early_handoff);
> > > +DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_usb_early_handoff);
> > >
> > > Now, before collecting informations to report the problem to usb folks
> > > and trying to debug further, I'm wondering if anyone else got this bug
> > > or if I'm just unlucky and has a hardware-specific issue. Also, if
> > > someone has an idea of what the problem may be or in which direction I
> > > should look at, please share.
> >
> > My iop n2100 shows the exact same problem with 2.6.32-rc1,
> > and reverting the commit mentioned above fixes it.
> >
> > None of my other machines (including two non-iop arms, x86,
> > and ultrasparc) have this problem even though they all have
> > PCI usb controllers. So the problem looks iop-specific.
>
> fyi, I've taken a look at linux-usb today and found :
> http://marc.info/?l=linux-usb&m=125426642829044&w=2
>
> So this bug is not iop specific. Even if it doesn't look arch specific,
> I'm surprised to see that so few machines are affected. I was hoping
> that all arm machines with usb host on pci were affected but according
> to your tests it's not the case.
Have you reported the ARM IOP breakage of this commit to the USB list?
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