[PATCH v1 2/7] ACPI: PM: Introduce acpi_device_init_power()

["Rafael J. Wysocki" <rafael@kernel.org>]

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

Two out of three callers of acpi_bus_init_power() need to clear
flags.power_manageable for the target device on errors, which
is somewhat cumbersome, so rename the function to
__acpi_device_init_power(), add a wrapper called
acpi_device_init_power() around it that will take care
of the flags.power_manageable clearing, and make the two
callers of acpi_bus_init_power() in question invoke that
wrapper.

While at it, clean up the declaration of local variables
in __acpi_device_init_power().

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/device_pm.c | 22 +++++++++++++++-------
 drivers/acpi/scan.c      |  5 ++---
 include/acpi/acpi_bus.h  |  2 +-
 3 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index a680e6972a8c..7fd780125177 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -169,10 +169,8 @@ int acpi_device_set_power(struct acpi_device *device, int state)
 		return -EINVAL;
 
 	if (device->power.state == ACPI_STATE_UNKNOWN &&
-	    acpi_bus_init_power(device)) {
-		device->flags.power_manageable = 0;
+	    acpi_device_init_power(device))
 		return -ENODEV;
-	}
 
 	acpi_handle_debug(device->handle, "Power state change: %s -> %s\n",
 			  acpi_power_state_string(device->power.state),
@@ -310,10 +308,9 @@ int acpi_bus_set_power(acpi_handle handle, int state)
 }
 EXPORT_SYMBOL(acpi_bus_set_power);
 
-int acpi_bus_init_power(struct acpi_device *device)
+static int __acpi_device_init_power(struct acpi_device *device)
 {
-	int state;
-	int result;
+	int result, state;
 
 	result = acpi_device_get_power(device, &state);
 	if (result)
@@ -355,6 +352,17 @@ int acpi_bus_init_power(struct acpi_device *device)
 	return 0;
 }
 
+int acpi_device_init_power(struct acpi_device *device)
+{
+	int ret;
+
+	ret = __acpi_device_init_power(device);
+	if (ret)
+		device->flags.power_manageable = 0;
+
+	return ret;
+}
+
 /**
  * acpi_device_fix_up_power - Force device with missing _PSC into D0.
  * @device: Device object whose power state is to be fixed up.
@@ -417,7 +425,7 @@ int acpi_device_update_power(struct acpi_device *device, int *state_p)
 	int result;
 
 	if (device->power.state == ACPI_STATE_UNKNOWN) {
-		result = acpi_bus_init_power(device);
+		result = __acpi_device_init_power(device);
 		if (!result && state_p)
 			*state_p = device->power.state;
 
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 1ad8dffc2daf..5aa3ecb000e1 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2362,9 +2362,8 @@ static int acpi_bus_attach(struct acpi_device *device, void *first_pass)
 	acpi_ec_register_opregions(device);
 
 	if (device->flags.power_manageable &&
-	    device->power.state == ACPI_STATE_UNKNOWN &&
-	    acpi_bus_init_power(device))
-		device->flags.power_manageable = 0;
+	    device->power.state == ACPI_STATE_UNKNOWN)
+		acpi_device_init_power(device);
 
 	if (device->flags.visited)
 		goto ok;
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 1a45e0d521d8..b0d9057ccb8a 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -618,7 +618,7 @@ int acpi_bus_get_status(struct acpi_device *device);
 int acpi_bus_set_power(acpi_handle handle, int state);
 const char *acpi_power_state_string(int state);
 int acpi_device_set_power(struct acpi_device *device, int state);
-int acpi_bus_init_power(struct acpi_device *device);
+int acpi_device_init_power(struct acpi_device *device);
 int acpi_device_fix_up_power(struct acpi_device *device);
 void acpi_device_fix_up_power_extended(struct acpi_device *adev);
 void acpi_device_fix_up_power_children(struct acpi_device *adev);
-- 
2.51.0