On Thu, Apr 12, 2012 at 10:28:31AM -0400, Alan Stern wrote: > Here's a diagnostic patch that will give us a little more information. > Keep the previous change (so that pci_prepare_to_sleep gets called > whether ehci-hcd is bound or not) and let's see what it says. Try > doing it both with and without ehci-hcd bound. Running this with "echo > devices >/sys/power/pm_test" ought to be good enough. If bound: "target 3 wakeup 1 error 0" for both controllers. If not bound, pci_prepare_to_sleep is not called for ehci_hcd. > > Alan Stern > > > > Index: usb-3.4/drivers/pci/pci.c > =================================================================== > --- usb-3.4.orig/drivers/pci/pci.c > +++ usb-3.4/drivers/pci/pci.c > @@ -1720,6 +1720,9 @@ int pci_prepare_to_sleep(struct pci_dev > > error = pci_set_power_state(dev, target_state); > > + dev_info(&dev->dev, "target %d wakeup %d error %d\n", > + target_state, device_may_wakeup(&dev->dev), error); > + > if (error) > pci_enable_wake(dev, target_state, false); > > > -- WBR, wRAR
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