acpi_power_meter: remove duplicate code between register_{ro,rw}_attrs

Key off the attr->set method being present to set the sysfs attribute
as writable.

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>

drivers/hwmon/acpi_power_meter.c

@@ -630,49 +630,24 @@ end:
 }
 
 /* Registration and deregistration */
-static int register_ro_attrs(struct acpi_power_meter_resource *resource,
-			     struct sensor_template *ro)
+static int register_attrs(struct acpi_power_meter_resource *resource,
+			  struct sensor_template *attrs)
 {
 	struct device *dev = &resource->acpi_dev->dev;
 	struct sensor_device_attribute *sensors =
 		&resource->sensors[resource->num_sensors];
 	int res = 0;
 
-	while (ro->label) {
-		sensors->dev_attr.attr.name = ro->label;
+	while (attrs->label) {
+		sensors->dev_attr.attr.name = attrs->label;
 		sensors->dev_attr.attr.mode = S_IRUGO;
-		sensors->dev_attr.show = ro->show;
-		sensors->index = ro->index;
+		sensors->dev_attr.show = attrs->show;
+		sensors->index = attrs->index;
 
-		sysfs_attr_init(&sensors->dev_attr.attr);
-		res = device_create_file(dev, &sensors->dev_attr);
-		if (res) {
-			sensors->dev_attr.attr.name = NULL;
-			goto error;
+		if (attrs->set) {
+			sensors->dev_attr.attr.mode |= S_IWUSR;
+			sensors->dev_attr.store = attrs->set;
 		}
-		sensors++;
-		resource->num_sensors++;
-		ro++;
-	}
-
-error:
-	return res;
-}
-
-static int register_rw_attrs(struct acpi_power_meter_resource *resource,
-			     struct sensor_template *rw)
-{
-	struct device *dev = &resource->acpi_dev->dev;
-	struct sensor_device_attribute *sensors =
-		&resource->sensors[resource->num_sensors];
-	int res = 0;
-
-	while (rw->label) {
-		sensors->dev_attr.attr.name = rw->label;
-		sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR;
-		sensors->dev_attr.show = rw->show;
-		sensors->dev_attr.store = rw->set;
-		sensors->index = rw->index;
 
 		sysfs_attr_init(&sensors->dev_attr.attr);
 		res = device_create_file(dev, &sensors->dev_attr);
@@ -682,7 +657,7 @@ static int register_rw_attrs(struct acpi_power_meter_resource *resource,
 		}
 		sensors++;
 		resource->num_sensors++;
-		rw++;
+		attrs++;
 	}
 
 error:
@@ -714,10 +689,10 @@ static int setup_attrs(struct acpi_power_meter_resource *resource)
 		return res;
 
 	if (resource->caps.flags & POWER_METER_CAN_MEASURE) {
-		res = register_ro_attrs(resource, meter_ro_attrs);
+		res = register_attrs(resource, meter_ro_attrs);
 		if (res)
 			goto error;
-		res = register_rw_attrs(resource, meter_rw_attrs);
+		res = register_attrs(resource, meter_rw_attrs);
 		if (res)
 			goto error;
 	}
@@ -730,27 +705,27 @@ static int setup_attrs(struct acpi_power_meter_resource *resource)
 		}
 
 		if (resource->caps.configurable_cap) {
-			res = register_rw_attrs(resource, rw_cap_attrs);
+			res = register_attrs(resource, rw_cap_attrs);
 			if (res)
 				goto error;
 		} else {
-			res = register_ro_attrs(resource, ro_cap_attrs);
+			res = register_attrs(resource, ro_cap_attrs);
 			if (res)
 				goto error;
 		}
-		res = register_ro_attrs(resource, misc_cap_attrs);
+		res = register_attrs(resource, misc_cap_attrs);
 		if (res)
 			goto error;
 	}
 skip_unsafe_cap:
 
 	if (resource->caps.flags & POWER_METER_CAN_TRIP) {
-		res = register_rw_attrs(resource, trip_attrs);
+		res = register_attrs(resource, trip_attrs);
 		if (res)
 			goto error;
 	}
 
-	res = register_ro_attrs(resource, misc_attrs);
+	res = register_attrs(resource, misc_attrs);
 	if (res)
 		goto error;