ACPI: power: don't cache power resource state

ACPI may change power resource state behind our back, so don't
keep our local copy, which may not be valid.

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
这个提交包含在:
Alexey Starikovskiy
2007-10-22 14:19:09 +04:00
提交者 Len Brown
父节点 95b937e3f5
当前提交 c35923bc55
修改 2 个文件,包含 26 行新增43 行删除

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@@ -198,11 +198,9 @@ int acpi_bus_set_power(acpi_handle handle, int state)
return -ENODEV;
}
/*
* Get device's current power state if it's unknown
* This means device power state isn't initialized or previous setting failed
* Get device's current power state
*/
if ((device->power.state == ACPI_STATE_UNKNOWN) || device->flags.force_power_state)
acpi_bus_get_power(device->handle, &device->power.state);
acpi_bus_get_power(device->handle, &device->power.state);
if ((state == device->power.state) && !device->flags.force_power_state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
state));