Messages in this thread Patch in this message | | | Date | Fri, 30 Oct 2020 18:33:15 +0000 | From | Jonathan McDowell <> | Subject | [PATCH net] net: dsa: qca8k: Fix port MTU setting |
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The qca8k only supports a switch-wide MTU setting, and the code to take the max of all ports was only looking at the port currently being set. Fix to examine all ports.
Reported-by: DENG Qingfang <dqfext@gmail.com> Fixes: f58d2598cf70 ("net: dsa: qca8k: implement the port MTU callbacks") Cc: stable@vger.kernel.org Signed-off-by: Jonathan McDowell <noodles@earth.li> --- drivers/net/dsa/qca8k.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index 53064e0e1618..5bdac669a339 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -1219,8 +1219,8 @@ qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu) priv->port_mtu[port] = new_mtu; for (i = 0; i < QCA8K_NUM_PORTS; i++) - if (priv->port_mtu[port] > mtu) - mtu = priv->port_mtu[port]; + if (priv->port_mtu[i] > mtu) + mtu = priv->port_mtu[i]; /* Include L2 header / FCS length */ qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN); -- 2.20.1
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