Messages in this thread | | | Date | Wed, 13 Sep 2006 17:55:06 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [linux-usb-devel] 2.6.18-rc6-mm1 (-mm2): ohci resume problem |
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On Wed, 13 Sep 2006, Rafael J. Wysocki wrote:
> > Try this patch instead. It looks for problems occurring a little earlier > > in the call chain. > > I've applied both patches at a time (I hope they don't conflict). > > The dmesg output is attached.
The dmesg output shows the root-hub device state is set wrong.
I have to leave now, so I can't give you another patch to try. You can experiment as follows...
Look in drivers/usb/host/ehci-pci.c, at ehci_pci_resume(). The part of interest is everything following the "restart:" statement label.
Try adding some ehci_dbg() lines in there (copy the form of the line just after restart:). We want to follow the value of hcd->self.root_hub->state. Initially it should be equal to USB_STATE_SUSPENDED (= 8), and it shouldn't change. But somewhere it is getting set to USB_STATE_CONFIGURED (= 7). I don't know where, but almost certainly somewhere in this routine. If you can find out where that happens, I'd appreciate it.
Alan Stern
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