net: dsa: b53: allow lower MTUs on BCM5325/5365

While BCM5325/5365 do not support jumbo frames, they do support slightly
oversized frames, so do not error out if requesting a supported MTU for
them.

Fixes: 6ae5834b983a ("net: dsa: b53: add MTU configuration support")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index e8b20bfa8b83ea7ac643bd5d005e2983747bd478..5b83f9b6cdac3de6c5e6e2164c78146d694674cd 100644 (file)
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -2258,7 +2258,7 @@ static int b53_change_mtu(struct dsa_switch *ds, int port, int mtu)
        bool allow_10_100;
 
        if (is5325(dev) || is5365(dev))
-               return -EOPNOTSUPP;
+               return 0;
 
        if (!dsa_is_cpu_port(ds, port))
                return 0;