On Tue, 17 Apr 2012, Andrey Rahmatullin wrote: > On Tue, Apr 17, 2012 at 11:11:04AM -0400, Alan Stern wrote: > > Just to make sure, did you test the patch with the script installed > > (that is, with ehci-hcd unbound)? I assume that will work normally. > It works normally, yes. > > > > > Moving on, the next thing is to remove changes from the patch, one at a > > time, until we find one that prevents the system from resuming. So, > > testing at each step, please remove from the patch: > > > > 1. This change in hcd-pci.c: > > + pci_dev->current_state = PCI_UNKNOWN; > It locks up if this line is removed. Very bizarre indeed. All right, leave that line in place and try removing the other changes, one at a time. In fact, let's add one more thing to remove from the patch > > 2. This change in ehci-pci.c: > > + ehci_silence_controller(ehci); > > > > 3. This change in hcd-pci.c: > > + pci_disable_device(pci_dev); > > > > 4. This change in hcd-pci.c: > > + iounmap(hcd->regs); > > > > 5. This change in hcd-pci.c: > > + free_irq(hcd->irq, hcd); > > > > 6. This change in hcd-pci.c: > > - pci_disable_device(pci_dev); > > + pci_disable_enabled_device(pci_dev); > > > > 7. This change in ehci-pci.c: > > - ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup); 8. This change in ehci-pci.c: + ehci_reset(ehci); If you manage to reach the end of this list, you'll essentially be doing a normal suspend (except for the PCI_UNKNOWN part). Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
