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ACPI / PM: Only set power states of devices that are power manageable 

Make acpi_device_set_power() check if the given device is power
manageable before checking if the given power state is valid for that
device.  Otherwise it will print that "Device does not support" that
power state into the kernel log, which may not make sense for some
power states (D0 and D3cold are supported by all devices by
definition).

Tested-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2013-07-30 14:34:00 +02:00
parent 5ae90d8e46
commit 2c7d132a58
1 changed files with 2 additions and 1 deletions
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3
drivers/acpi/device_pm.c
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@ -159,7 +159,8 @@ int acpi_device_set_power(struct acpi_device *device, int state)
int result = 0;
bool cut_power = false;
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
if (!device || !device->flags.power_manageable
|| (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
return -EINVAL;
/* Make sure this is a valid target state */