Re: [RFT] PCI changes related to wakeup (was: Re: ehci_hcd related S3 lockup on ASUS laptops, again)

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On Sunday, May 27, 2012, Alan Stern wrote:
> On Sun, 27 May 2012, Andrey Rahmatullin wrote:
> 
> > On Sun, May 27, 2012 at 12:06:01AM +0200, Rafael J. Wysocki wrote:
> > > > > Andrey, Stephen,
> > > > > 
> > > > > We still have problems with this patch in https://bugzilla.kernel.org/show_bug.cgi?id=43278
> > > > > so some more testing will be necessary, I'm afraid.
> > > > > 
> > > > > I will send a series of ACPI and PCI patches I have collected so far,
> > > > > that I'd like you to test on top of kernel 3.4.0 with commit
> > > > > 151b61284776 reverted.
> > > > > 
> > > > > Please let me know if suspend/wakeup work for you with these patches applied.
> > > > I get the usual freeze on suspending with these patches.
> > > 
> > > I see.
> > > 
> > > Please try to unapply [4/4] and see if that helps.
> > It helps.
> 
> Trying to follow the ACPI spec too closely may be a bad idea.  We 
> should try to copy what Windows does (whatever that is!).

Well, that's why I made it a separate patch, among other things. :-)

So, do you think we should apply [1/4] and [2/4] and try to work around the
BIOS bug from https://bugzilla.kernel.org/show_bug.cgi?id=43278 (I suppose
we can do that by double checking if the target state returned by ACPI is
in agreement with the capabilities returned by the PCI layer)?

Rafael
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