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Re: [ath5k-devel] [linux-pm] PCI hotplug v.s. suspend

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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.)

> 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

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