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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