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| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2009-05-21 17:28:53 -0600 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-05-27 21:45:53 -0400 |
| commit | bdf43bbf2e19952d82995a50e00cb4b66afa4f0c (patch) | |
| tree | a7e7f84117f6c26c3a0f22439664fb9b4645cbcc /drivers/acpi/pci_irq.c | |
| parent | cd86a536c81e9300d984327517548ca0652eebf9 (diff) | |
| download | linux-bdf43bbf2e19952d82995a50e00cb4b66afa4f0c.tar.gz | |
ACPI: don't check power state after _ON/_OFF
We used to evaluate _STA to check the power state of a device after
running _ON or _OFF. But as far as I can tell, there's no benefit
to evaluating _STA, and sometimes we trip over bugs when BIOSes don't
implement _STA correctly.
Yakui says Windows XP doesn't evaluate _STA during power transition.
So let's skip it in Linux, too. It's conceivable that we'll need to
check _STA in the future for some reason, but until we do, I don't
see a reason to clutter this code path.
References:
http://bugzilla.kernel.org/show_bug.cgi?id=13243
http://marc.info/?l=linux-acpi&m=124166053803753&w=2
http://marc.info/?l=linux-acpi&m=124175761408256&w=2
http://marc.info/?l=linux-acpi&m=124210593114061&w=2
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/pci_irq.c')
0 files changed, 0 insertions, 0 deletions