[PATCH 6.4 772/800] leds: trigger: netdev: Recheck NETDEV_LED_MODE_LINKUP on dev rename

Greg Kroah-Hartman
2023-07-16T20:28:55Z

From: Christian Marangi <ansuelsmth@gmail.com>

commit cee4bd16c3195a701be683f7da9e88c6e11acb73 upstream.

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")
Cc: stable@vger.kernel.org # v5.5+
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230419210743.3594-2-ansuelsmth@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/leds/trigger/ledtrig-netdev.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -318,6 +318,9 @@ static int netdev_trig_notify(struct not
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);