Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [linux-usb-devel] 2.6.18-rc6-mm1 (-mm2): ohci resume problem | Date | Thu, 14 Sep 2006 16:08:45 +0200 |
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On Thursday, 14 September 2006 15:14, Rafael J. Wysocki wrote: > On Wednesday, 13 September 2006 23:55, Alan Stern wrote: > > 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. > > Done, but it shows hcd->self.root_hub->state is already 7 right after restart.
BTW, all of the systems on which the problem shows up seem to be 64-bit.
If you can't reproduce it on a 32-bit system, some type casting may be wrong somewhere.
Greetings, Rafael
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