target/linux/generic/backport-5.15/818-v6.5-06-leds-trigger-netdev-add-basic-check-for-hw-control-s.patch

   1 From 6352f25f9fadba59d5df2ba7139495759ccc81d5 Mon Sep 17 00:00:00 2001
   2 From: Christian Marangi <ansuelsmth@gmail.com>
   3 Date: Mon, 29 May 2023 18:32:36 +0200
   4 Subject: [PATCH 06/13] leds: trigger: netdev: add basic check for hw control
   5  support
   6
   7 Add basic check for hw control support. Check if the required API are
   8 defined and check if the defined trigger supported in hw control for the
   9 LED driver match netdev.
  10
  11 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
  12 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  13 Signed-off-by: David S. Miller <davem@davemloft.net>
  14 ---
  15  drivers/leds/trigger/ledtrig-netdev.c | 14 ++++++++++++++
  16  1 file changed, 14 insertions(+)
  17
  18 --- a/drivers/leds/trigger/ledtrig-netdev.c
  19 +++ b/drivers/leds/trigger/ledtrig-netdev.c
  20 @@ -92,8 +92,22 @@ static void set_baseline_state(struct le
  21         }
  22  }
  23
  24 +static bool supports_hw_control(struct led_classdev *led_cdev)
  25 +{
  26 +       if (!led_cdev->hw_control_get || !led_cdev->hw_control_set ||
  27 +           !led_cdev->hw_control_is_supported)
  28 +               return false;
  29 +
  30 +       return !strcmp(led_cdev->hw_control_trigger, led_cdev->trigger->name);
  31 +}
  32 +
  33  static bool can_hw_control(struct led_netdev_data *trigger_data)
  34  {
  35 +       struct led_classdev *led_cdev = trigger_data->led_cdev;
  36 +
  37 +       if (!supports_hw_control(led_cdev))
  38 +               return false;
  39 +
  40         return false;
  41  }
  42