run resume code only for S1-S4 states

[Fabian Keil]

Andriy Gapon <avg at freebsd.org> wrote:

> An updated version of the patch, the only difference is: do-while(0) is gone,
> breaks are replaces with gotos, indentation is reduced.
> 
> Per Nate's request I am calling for people with SMP systems to test if powering
> off via power button still works with this change. It's desirable to test power
> off at least two times to increase a chance of non-BSP CPU being used.

With an AMD Athlon(tm) 64 X2 Dual Core Processor 4600+ (2542.15-MHz K8-class CPU)
the first few shutdowns were successful, but on the fourth try pressing the
power button only lead to:

Apr 18 12:52:42 kendra kernel: acpi: suspend request ignored (not ready yet)
Apr 18 12:52:42 kendra kernel: acpi: request to enter state S5 failed (err 6)
Apr 18 12:52:43 kendra kernel: acpi: suspend request ignored (not ready yet)
Apr 18 12:52:43 kendra kernel: acpi: request to enter state S5 failed (err 6)
Apr 18 12:52:43 kendra kernel: acpi: suspend request ignored (not ready yet)
Apr 18 12:52:43 kendra kernel: acpi: request to enter state S5 failed (err 6)
[...]

Fabian
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