On Thu, 14 Sep 2006, Rafael J. Wysocki wrote: > > > 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.
I realized last night what the problem must be. It's extremely obvious in retrospect, but I happen to have a blind spot in this particular area. All you guys must have CONFIG_USB_SUSPEND turned off. Mattis certainly does; I checked his .config. Now I hardly ever do any testing without CONFIG_USB_SUSPEND, since there's not much point working on power management code if your kernel isn't set up to actually suspend devices. As a result I missed seeing the problems caused by the autosuspend changes. Now of course, the autosuspend stuff has to work properly no matter what the kernel configuration is. I'll go back and rebuild the drivers with USB_SUSPEND turned off and see what happens. With any luck I'll have a fix ready in the near future. Alan Stern ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
