Re: [BUG] APM resume breakage from 2.6.18-rc1 clocksource changes

[john stultz <johnstul@us.ibm.com>]

On Tue, 2006-07-11 at 00:37 +0200, Roman Zippel wrote:
> Hi,
> 
> On Mon, 10 Jul 2006, Pavel Machek wrote:
> 
> > APM can only keep interrupts disabled on non-IBM machines, presumably
> > due to BIOS problems.
> 
> Is it possible to disable the timer interrupt before suspend and just 
> reinit the timer afterwards?

The timer interrupt is re-enabled, via the timer_sysclass::resume hook,
while the timekeeping code is re-enabled via the
timekeeping_sysclass::resume hook. The issue being that I'm not sure
there's a defined way to specify the .resume calling order.

The timekeeping_suspended flag is a bit heavy handed, but I think it
might be the safest bet (assuming Mikael finds it works for him).

thanks
-john




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