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-rw-r--r--net/hsr/hsr_main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/hsr/hsr_main.c b/net/hsr/hsr_main.c
index 9756e657ba..d7ae32473c 100644
--- a/net/hsr/hsr_main.c
+++ b/net/hsr/hsr_main.c
@@ -96,7 +96,7 @@ static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
break; /* Handled in ndo_change_mtu() */
mtu_max = hsr_get_max_mtu(port->hsr);
master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER);
- master->dev->mtu = mtu_max;
+ WRITE_ONCE(master->dev->mtu, mtu_max);
break;
case NETDEV_UNREGISTER:
if (!is_hsr_master(dev)) {