Am Mittwoch, 8. Februar 2012, 00:31:18 schrieb Sarah Sharp: > The downside is that the xHCI BIOS handoff mechanism will fail because > memory mapped I/O is not enabled for the disabled PCI device. Make the > xHCI quirk handler call pci_enable_device() to re-enable MMIO, and call > pci_disable_device() once it's done with the BIOS handoff. This will > balance the ref counts in the PCI core. When the xHCI PCI probe is > called, usb_hcd_pci_probe() will call pci_enable_device() again. > > Also add some debugging to the xHCI quirk failure paths, so we can pin > point the problem when a user says their xHCI PCI quirk function fails. > > Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx> > --- > > Hi Oliver, > > What about this approach instead? This means the PCI quirk sequence > doesn't change, and the xHCI ports are still switched over before the > EHCI PCI probe starts. With your original patch, the ports could be > switched over after the EHCI driver has already started to enumerate > devices. > > Can you test and make sure this fixes the issue on your test systems? I've tested it and it works. Are you sure it is safe to enable a PCI device at that point? If so, your patch is better than mine. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
