On Monday, January 26, 2009 12:43 pm Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rjw@xxxxxxx> > > If one of device drivers refuses to suspend by returning error code > from its ->suspend() callback, the devices that have already been > suspended are resumed by executing their drivers' ->resume() > callbacks. Some of these callbacks expect the device's > configuration space to be restored if the device has been put into > D3 before they are called. Unfortunately, this mechanism has been > broken by recent changes moving the restoration of config spaces > of some devices (most importantly, USB controllers and HDA Intel) > into the resume callbacks executed with interrupts off. Obviously, > these callbacks are not invoked in the suspend error path and, as a > result, the system cannot be successfully brought back into the > working state in case of a suspend error. The same thing happens > in the hibernation error path right before putting the system into > S4. > > Similarly, the suspend testing facility associated with the > /sys/power/pm_test file is broken, because it uses the very same > mechanism that is used in the suspend and hibernation error paths. > > Fix the breakage by making the PCI core restore the configuration > spaces of PCI devices that haven't been restored already before > pci_pm_resume() is called for those devices by the PM core. Applied to my for-linus branch, thanks. -- Jesse Barnes, Intel Open Source Technology Center _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
