Alan Stern wrote: > On Thu, 18 Jun 2009, Alan Jenkins wrote: > > >> Unfortunately this makes it worse. My eeepc-laptop hacks are now in >> wireless-testing. If I apply the above patch to wireless-testing and >> "remove" the device while suspended, I get a soft hang on resume. >> > > Is this different from the behavior without the patch? (I don't see > how it could be.) > Ow. No, the free_irq patch doesn't cause this bug. I missed testing this case after adding a workaround for an even more obscure issue :-(. I have a good idea how eeepc-laptop could cause a double-free error. I suspect we originally got away with trying to call pci_remove_device() twice, but it's not actually legal, and my workaround caused two attempts to happen much closer together. I'll fix it tomorrow and re-test. With _both_ of my nasty scenarios this time (and the normal ones) - I should really make a checklist :-). >> Suspending without removal works fine. >> >> I can see a BUG if I boot with no_console_suspend >> >> Unable to handle kernel NULL pointer dereference >> IP: klist_put >> Tainted: G W >> Process s2disk >> >> Call trace: >> ? klist_del >> ? device_del >> ? device_unregister >> ? pci_stop_dev >> ? pci_stop_bus >> ? pci_remove_device >> ? eeepc_rfkill_hotplug [eeepc_laptop] >> ? eeepc_hotk_resume [eeepc_laptop] >> ? acpi_device_resume >> ? device_resume >> ? hibernation_snapshot >> > > This should be doing more or less the same thing as if you removed the > device while the system was running. Or is it not hot-unpluggable? > > Alan Stern > Outside of suspend, I can hot-unplug the device alright. I'm blaming my hotplug driver resume handler. Thanks Alan _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
