linux-kernel - [PATCH 1/5] leds: trigger: netdev: recheck NETDEV_LED_MODE

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Date:   Wed, 19 Apr 2023 23:07:39 +0200
From:   Christian Marangi <ansuelsmth@...il.com>
To:     Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>,
        Christian Marangi <ansuelsmth@...il.com>,
        Martin Schiller <ms@....tdt.de>, linux-leds@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andrew Lunn <andrew@...n.ch>
Cc:     stable@...r.kernel.org
Subject: [PATCH 1/5] leds: trigger: netdev: recheck NETDEV_LED_MODE_LINKUP on dev rename

Dev can be renamed also while up for supported device. We currently
wrongly clear the NETDEV_LED_MODE_LINKUP flag on NETDEV_CHANGENAME
event.

Fix this by rechecking if the carrier is ok on NETDEV_CHANGENAME and
correctly set the NETDEV_LED_MODE_LINKUP bit.

Fixes: 5f820ed52371 ("leds: trigger: netdev: fix handling on interface rename")
Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
Cc: stable@...r.kernel.org # v5.5+
---
 drivers/leds/trigger/ledtrig-netdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
index d5e774d83021..f4d670ec30bc 100644
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -318,6 +318,9 @@ static int netdev_trig_notify(struct notifier_block *nb,
 	clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
 	switch (evt) {
 	case NETDEV_CHANGENAME:
+		if (netif_carrier_ok(dev))
+			set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+		fallthrough;
 	case NETDEV_REGISTER:
 		if (trigger_data->net_dev)
 			dev_put(trigger_data->net_dev);
-- 
2.39.2