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| author | Rafael J. Wysocki <[email protected]> | 2010-12-17 22:34:01 +0100 |
|---|---|---|
| committer | Len Brown <[email protected]> | 2010-12-17 16:39:11 -0500 |
| commit | b581a7f9c3abc6c7afacd021747543d32ff17adb (patch) | |
| tree | e62cdfdcbe11a8b644d60478f462d7af38bdbdf9 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace | |
| parent | cf7d7e5a1980d1116ee152d25dac382b112b9c17 (diff) | |
ACPI: Execute _PRW for devices reported as inactive or not present
If a device is reported as inactive or not present by its _STA
control method, acpi_bus_check_add() skips it without evaluating its
_PRW method. This leads to a problem when the device's _PRW method
points to a GPE, because in that case the GPE may be enabled by
ACPICA during the subsequent acpi_update_gpes() call which, in
turn, may cause a GPE storm to appear.
To avoid this issue, make acpi_bus_check_add() evaluate _PRW for
inactive or not present devices and register the wakeup GPE
information returned by them, so that acpi_update_gpes() does not
enable their GPEs unnecessarily.
Signed-off-by: Rafael J. Wysocki <[email protected]>
Reported-by: Matthew Garrett <[email protected]>
Signed-off-by: Len Brown <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
0 files changed, 0 insertions, 0 deletions