[linux-pm] ehci_hcd related S3 lockup on ASUS laptops, again

Alan Stern stern at rowland.harvard.edu
Fri Apr 13 01:09:23 UTC 2012

On Fri, 13 Apr 2012, Andrey Rahmatullin wrote:

> With
> - pci_prepare_to_sleep in pci_pm_suspend_noirq
> - pci_disable_enabled_device instead of pci_disable_device in
>   suspend_common
> - ehci_reset at the end of ehci_pci_suspend
> it still locks up.

I expected that.  Sigh.

Tomorrow I'll look through the code more carefully; with those changes
there really is very little difference between the two cases.  Things
like mmio mappings and IRQs requested; they shouldn't cause a crash.

Alan Stern

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