On Wed, Dec 06, Benjamin Herrenschmidt wrote: > On Tue, 2006-12-05 at 09:15 +0100, Olaf Hering wrote: > > On Tue, Dec 05, Benjamin Herrenschmidt wrote: > > > > > Olaf, can you give me a dump of /proc/ioports ? What is sitting at 0 on > > > that PCI bus ? > > > > with IDE=y > > > > ==> /proc/ioports <== > > 00000000-0000001f : dma1 > > So it's indeed colliding with the cruft above. > > I reckon it's a bug in the firmware of this machine. > > Add to pseries/pci.c a quirk for that chipset (don't forget to test for > machine_is(pseries) in the quirk as they get called for all platforms in > a combo kernel. The quirk shall check if resource 6 has a 0 base and > clear the size as Alan suggested (possibly setting the UNSET flag as > well). I will test this change tomorrow: +++ linux-2.6/arch/powerpc/platforms/pseries/pci.c @@ -98,6 +98,10 @@ static void fixup_winbond_82c105(struct if (dev->resource[i].flags & IORESOURCE_IO && dev->bus->number == 0 && dev->devfn == 0x81) dev->resource[i].flags &= ~IORESOURCE_IO; + if (dev->resource[i].start == 0) { + printk("disable IO resource %d on W82c105 IDE controller\n", i); + dev->resource[i].flags = IORESOURCE_DISABLED; + } } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, Or did you mean 'if (dev->resource[5].start == 0)' ? - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html