linux-kernel - [PATCH net-next] can: dev: call netif_carrier_off() in register

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Date:   Mon, 24 Jun 2019 08:34:13 +0000
From:   Rasmus Villemoes <rasmus.villemoes@...vas.dk>
To:     Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>
CC:     Rasmus Villemoes <Rasmus.Villemoes@...vas.se>,
        "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH net-next] can: dev: call netif_carrier_off() in
 register_candev()

CONFIG_CAN_LEDS is deprecated. When trying to use the generic netdev
trigger as suggested, there's a small inconsistency with the link
property: The LED is on initially, stays on when the device is brought
up, and then turns off (as expected) when the device is brought down.

Make sure the LED always reflects the state of the CAN device.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@...vas.dk>
---
 drivers/net/can/dev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index c05e4d50d43d..fad27ace6248 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -1260,6 +1260,7 @@ int register_candev(struct net_device *dev)
 		return -EINVAL;
 
 	dev->rtnl_link_ops = &can_link_ops;
+	netif_carrier_off(dev);
 	return register_netdev(dev);
 }
 EXPORT_SYMBOL_GPL(register_candev);
-- 
2.20.1