[PATCH net 1/5] can: netlink: can_changelink(): add missing error handling to call can_ctrlmode_changelink()

In commit e1a5cd9d6665 ("can: netlink: add can_ctrlmode_changelink()") the
CAN Control Mode (IFLA_CAN_CTRLMODE) handling was factored out into the
can_ctrlmode_changelink() function. But the call to
can_ctrlmode_changelink() is missing the error handling.

Add the missing error handling and propagation to the call
can_ctrlmode_changelink().

Cc: stable@vger.kernel.org
Fixes: e1a5cd9d6665 ("can: netlink: add can_ctrlmode_changelink()")
Link: https://patch.msgid.link/20260310-can_ctrlmode_changelink-add-error-handling-v1-1-0daf63d85922@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/dev/netlink.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/dev/netlink.c b/drivers/net/can/dev/netlink.c
index 0498198a4696..766d455950f5 100644
--- a/drivers/net/can/dev/netlink.c
+++ b/drivers/net/can/dev/netlink.c

@@ -601,7 +601,9 @@ static int can_changelink(struct net_device *dev, struct nlattr *tb[],
 	/* We need synchronization with dev->stop() */
 	ASSERT_RTNL();
 
-	can_ctrlmode_changelink(dev, data, extack);
+	err = can_ctrlmode_changelink(dev, data, extack);
+	if (err)
+		return err;
 
 	if (data[IFLA_CAN_BITTIMING]) {
 		struct can_bittiming bt;

base-commit: 8a63baadf08453f66eb582fdb6dd234f72024723
-- 
2.53.0