On Thursday 09 August 2007, Zephaniah E. Hull wrote: > OHCI isn't coming back on the OLPC after resume. > > After a bit of testing, the problem seems to have come down to two points. > > The first is that ohci_pci_resume is not forcing the root hub to be resumed > properly, that's a fairly trivial and obviously correct patch. > > The second is trickier, ohci_rh_resume is getting called in a state that it > thinks is an indication that it's coming back from a SUSPEND where it did not > lose power.
What's putting it into the OHCI_USB_SUSPEND state? If it lost power, it should still be in the OHCI_USB_RESET state. The root cause would seem to be that on a "suspend" (not hibernate) path, something is mucking with that controller that should be just leaving it alone ... a firmware bug, maybe. > I've patched it, and hopefully there won't be any false positives, but I don't > have another machine to do suspend/resume testing on, so while it works for > me, > I can't guarantee that it won't cause problems for others. > > In any case, USB 1.1 devices directly plugged into the machine didn't work > after resume before this, and do now. > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
