leds: trigger: netdev: refactor code setting device name

Move the code into a helper, ready for it to be called at
other times. No intended behaviour change.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
index 305eb543ba84f3ffc9b03e877510a393ce358ac8..c93ac3bc85a63d0fae4b8a995e8024ee5c121f6d 100644 (file)
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -104,15 +104,9 @@ static ssize_t device_name_show(struct device *dev,
        return len;
 }
 
-static ssize_t device_name_store(struct device *dev,
-                                struct device_attribute *attr, const char *buf,
-                                size_t size)
+static int set_device_name(struct led_netdev_data *trigger_data,
+                          const char *name, size_t size)
 {
-       struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
-
-       if (size >= IFNAMSIZ)
-               return -EINVAL;
-
        cancel_delayed_work_sync(&trigger_data->work);
 
        mutex_lock(&trigger_data->lock);
@@ -122,7 +116,7 @@ static ssize_t device_name_store(struct device *dev,
                trigger_data->net_dev = NULL;
        }
 
-       memcpy(trigger_data->device_name, buf, size);
+       memcpy(trigger_data->device_name, name, size);
        trigger_data->device_name[size] = 0;
        if (size > 0 && trigger_data->device_name[size - 1] == '\n')
                trigger_data->device_name[size - 1] = 0;
@@ -140,6 +134,23 @@ static ssize_t device_name_store(struct device *dev,
        set_baseline_state(trigger_data);
        mutex_unlock(&trigger_data->lock);
 
+       return 0;
+}
+
+static ssize_t device_name_store(struct device *dev,
+                                struct device_attribute *attr, const char *buf,
+                                size_t size)
+{
+       struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+       int ret;
+
+       if (size >= IFNAMSIZ)
+               return -EINVAL;
+
+       ret = set_device_name(trigger_data, buf, size);
+
+       if (ret < 0)
+               return ret;
        return size;
 }