[PATCH v4 5/6] thermal/drivers/acpi: Move to dedicated function sysfs extra attr creation

[Daniel Lezcano <daniel.lezcano@linaro.org>]

The ACPI thermal driver creates extra sysfs attributes in its own
directory pointing to the thermal zone it is related to and add a
pointer to the sysfs ACPI thermal device from the thermal zone sysfs
entry.

This is very specific to this ACPI thermal driver, let's encapsulate
the related creation/deletion code to group it inside a function we
can identify later for removal if needed.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/acpi/thermal.c | 52 ++++++++++++++++++++++++++----------------
 1 file changed, 32 insertions(+), 20 deletions(-)

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5763db4528b8..9a90b1a117cd 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -787,9 +787,34 @@ static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
 	.critical = acpi_thermal_zone_device_critical,
 };
 
+static int acpi_thermal_zone_sysfs_add(struct acpi_thermal *tz)
+{
+	struct device *tzdev = thermal_zone_device(tz->thermal_zone);
+	int ret;
+	
+	ret = sysfs_create_link(&tz->device->dev.kobj,
+				&tzdev->kobj, "thermal_zone");
+	if (ret)
+		return ret;
+
+	ret = sysfs_create_link(&tzdev->kobj,
+				   &tz->device->dev.kobj, "device");
+	if (ret)
+		sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
+
+	return ret;
+}
+
+static void acpi_thermal_zone_sysfs_remove(struct acpi_thermal *tz)
+{
+	struct device *tzdev = thermal_zone_device(tz->thermal_zone);
+	
+	sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
+	sysfs_remove_link(&tzdev->kobj, "device");
+}
+
 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 {
-	struct device *tzdev;
 	int trips = 0;
 	int result;
 	acpi_status status;
@@ -821,23 +846,15 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 	if (IS_ERR(tz->thermal_zone))
 		return -ENODEV;
 
-	tzdev = thermal_zone_device(tz->thermal_zone);
-	
-	result = sysfs_create_link(&tz->device->dev.kobj,
-				   &tzdev->kobj, "thermal_zone");
+	result = acpi_thermal_zone_sysfs_add(tz);
 	if (result)
 		goto unregister_tzd;
-
-	result = sysfs_create_link(&tzdev->kobj,
-				   &tz->device->dev.kobj, "device");
-	if (result)
-		goto remove_tz_link;
-
+	
 	status =  acpi_bus_attach_private_data(tz->device->handle,
 					       tz->thermal_zone);
 	if (ACPI_FAILURE(status)) {
 		result = -ENODEV;
-		goto remove_dev_link;
+		goto remove_links;
 	}
 
 	result = thermal_zone_device_enable(tz->thermal_zone);
@@ -851,10 +868,8 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 
 acpi_bus_detach:
 	acpi_bus_detach_private_data(tz->device->handle);
-remove_dev_link:
-	sysfs_remove_link(&tzdev->kobj, "device");
-remove_tz_link:
-	sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
+remove_links:
+	acpi_thermal_zone_sysfs_remove(tz);
 unregister_tzd:
 	thermal_zone_device_unregister(tz->thermal_zone);
 
@@ -863,10 +878,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 
 static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
 {
-	struct device *tzdev = thermal_zone_device(tz->thermal_zone);
-	
-	sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
-	sysfs_remove_link(&tzdev->kobj, "device");
+	acpi_thermal_zone_sysfs_remove(tz);
 	thermal_zone_device_unregister(tz->thermal_zone);
 	tz->thermal_zone = NULL;
 	acpi_bus_detach_private_data(tz->device->handle);
-- 
2.34.1