From 9c0f45e388fb9f9003ea22f98b84ffbab65ba554 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 22 Jan 2013 12:55:52 +0100 Subject: ACPI / PM: Introduce helper for executing _PSn methods To reduce code duplication between acpi_device_set_power() and acpi_bus_init_power(), introduce a new helper function for executing ACPI devices' _PSn (n = 0..3) methods, acpi_dev_pm_explicit_set(). Signed-off-by: Rafael J. Wysocki --- drivers/acpi/device_pm.c | 51 ++++++++++++++++++++++-------------------------- 1 file changed, 23 insertions(+), 28 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index c87853f583d..d7f3908c2e8 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -186,6 +186,19 @@ int acpi_device_get_power(struct acpi_device *device, int *state) return 0; } +static int acpi_dev_pm_explicit_set(struct acpi_device *adev, int state) +{ + if (adev->power.states[state].flags.explicit_set) { + char method[5] = { '_', 'P', 'S', '0' + state, '\0' }; + acpi_status status; + + status = acpi_evaluate_object(adev->handle, method, NULL, NULL); + if (ACPI_FAILURE(status)) + return -ENODEV; + } + return 0; +} + /** * acpi_device_set_power - Set power state of an ACPI device. * @device: Device to set the power state of. @@ -197,8 +210,6 @@ int acpi_device_get_power(struct acpi_device *device, int *state) int acpi_device_set_power(struct acpi_device *device, int state) { int result = 0; - acpi_status status = AE_OK; - char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; bool cut_power = false; if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD)) @@ -228,7 +239,6 @@ int acpi_device_set_power(struct acpi_device *device, int state) if (state == ACPI_STATE_D3_COLD && device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible) { state = ACPI_STATE_D3_HOT; - object_name[3] = '3'; cut_power = true; } @@ -251,23 +261,14 @@ int acpi_device_set_power(struct acpi_device *device, int state) if (result) goto end; } - if (device->power.states[state].flags.explicit_set) { - status = acpi_evaluate_object(device->handle, - object_name, NULL, NULL); - if (ACPI_FAILURE(status)) { - result = -ENODEV; - goto end; - } - } + result = acpi_dev_pm_explicit_set(device, state); + if (result) + goto end; } else { - if (device->power.states[state].flags.explicit_set) { - status = acpi_evaluate_object(device->handle, - object_name, NULL, NULL); - if (ACPI_FAILURE(status)) { - result = -ENODEV; - goto end; - } - } + result = acpi_dev_pm_explicit_set(device, state); + if (result) + goto end; + if (device->power.flags.power_resources) { result = acpi_power_transition(device, state); if (result) @@ -335,15 +336,9 @@ int acpi_bus_init_power(struct acpi_device *device) if (result) return result; - if (device->power.states[state].flags.explicit_set) { - char method[5] = { '_', 'P', 'S', '0' + state, '\0' }; - acpi_status status; - - status = acpi_evaluate_object(device->handle, method, - NULL, NULL); - if (ACPI_FAILURE(status)) - return -ENODEV; - } + result = acpi_dev_pm_explicit_set(device, state); + if (result) + return result; } device->power.state = state; return 0; -- cgit v1.2.3