On Fri, Mar 01, 2013 at 08:41:13AM +0100, Hannes Reinecke wrote: > On 02/27/2013 10:13 PM, Bjorn Helgaas wrote: > >[+cc Andy] > > > >3) I don't understand why the xhci init fails in the first place. It > >looks like the "request interrupt 255 failed" message is from > >xhci_try_enable_msi(), but that function tries to enable MSI-X, then > >MSI, then falls back to legacy interrupts, where we get the error. > >But the device supports MSI, so I don't know why we even fall back to > >trying legacy interrupts. Hannes, do you have any insight into that? > >Obviously I'm missing something here. > > > Hehe. Due to overly clever design. > xhci actually sets up interrupts _twice_, once per request_irq() in > the generic code and a second time during xhci_run. > But as the first call fails it'll never ever run the second part. > > I'll be sending a patch. Something like this? http://marc.info/?l=linux-usb&m=132972894117916&w=2 (Apparently we had this issue around the same time last year, but we thought the BIOS bug had been resolved.) Sarah Sharp -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
