target/linux/generic/backport-5.15/818-v6.5-04-leds-trigger-netdev-refactor-code-setting-device-nam.patch

   1 From 28a6a2ef18ad840a390d519840c303b03040961c Mon Sep 17 00:00:00 2001
   2 From: Andrew Lunn <andrew@lunn.ch>
   3 Date: Mon, 29 May 2023 18:32:34 +0200
   4 Subject: [PATCH 04/13] leds: trigger: netdev: refactor code setting device
   5  name
   6
   7 Move the code into a helper, ready for it to be called at
   8 other times. No intended behaviour change.
   9
  10 Signed-off-by: Andrew Lunn <andrew@lunn.ch>
  11 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14  drivers/leds/trigger/ledtrig-netdev.c | 29 ++++++++++++++++++---------
  15  1 file changed, 20 insertions(+), 9 deletions(-)
  16
  17 --- a/drivers/leds/trigger/ledtrig-netdev.c
  18 +++ b/drivers/leds/trigger/ledtrig-netdev.c
  19 @@ -104,15 +104,9 @@ static ssize_t device_name_show(struct d
  20         return len;
  21  }
  22
  23 -static ssize_t device_name_store(struct device *dev,
  24 -                                struct device_attribute *attr, const char *buf,
  25 -                                size_t size)
  26 +static int set_device_name(struct led_netdev_data *trigger_data,
  27 +                          const char *name, size_t size)
  28  {
  29 -       struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
  30 -
  31 -       if (size >= IFNAMSIZ)
  32 -               return -EINVAL;
  33 -
  34         cancel_delayed_work_sync(&trigger_data->work);
  35
  36         mutex_lock(&trigger_data->lock);
  37 @@ -122,7 +116,7 @@ static ssize_t device_name_store(struct
  38                 trigger_data->net_dev = NULL;
  39         }
  40
  41 -       memcpy(trigger_data->device_name, buf, size);
  42 +       memcpy(trigger_data->device_name, name, size);
  43         trigger_data->device_name[size] = 0;
  44         if (size > 0 && trigger_data->device_name[size - 1] == '\n')
  45                 trigger_data->device_name[size - 1] = 0;
  46 @@ -140,6 +134,23 @@ static ssize_t device_name_store(struct
  47         set_baseline_state(trigger_data);
  48         mutex_unlock(&trigger_data->lock);
  49
  50 +       return 0;
  51 +}
  52 +
  53 +static ssize_t device_name_store(struct device *dev,
  54 +                                struct device_attribute *attr, const char *buf,
  55 +                                size_t size)
  56 +{
  57 +       struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
  58 +       int ret;
  59 +
  60 +       if (size >= IFNAMSIZ)
  61 +               return -EINVAL;
  62 +
  63 +       ret = set_device_name(trigger_data, buf, size);
  64 +
  65 +       if (ret < 0)
  66 +               return ret;
  67         return size;
  68  }
  69