ACPI hibernation: Call _PTS before suspending devices

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The ACPI 1.0 specification wants us to put devices into low power
states after executing the _PTS global control method, while ACPI
2.0 and later want us to do that in the reverse order.  The current
hibernation code follows ACPI 2.0 in that respect which may cause some
ACPI 1.0x systems to hang during hibernation (ref.
http://bugzilla.kernel.org/show_bug.cgi?id=9528).

Make the hibernation code execute _PTS before putting devices into
low power states (ie. in accordance with ACPI 1.0x) with the
possibility to override that using the 'acpi_new_pts_ordering' kernel
command line option.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>

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Rafael J. Wysocki 2008-01-08 00:09:58 +01:00 • committed by Len Brown

parent caea99ef33

commit 7258ec5d11

1 changed files with 25 additions and 11 deletions

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36

drivers/acpi/sleep/main.c

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