On Wed, Jun 26, 2019 at 12:42 PM Andrew Lunn [off-list ref] wrote:

quoted

+static int gve_change_mtu(struct net_device *dev, int new_mtu)
+{
+     dev->mtu = new_mtu;
+     return 0;
+}

The default implementation does this.

Also, i think your mtu has a limit of PAGE size.  So you should set
the dev->max_mtu so the core will enforce this.

    Andrew

Ah, thanks, gve_change_mtu will be removed in v2.
We already set dev->max_mtu to PAGE_SIZE in init_priv.