r8152: change rx early size when the mtu is changed

The rx early size is calculated with the mtu, so it has to be
re-calculated when the mtu is changed.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 8a8d3a3b18bddb917d29888f00ac25e6fae3bc76..5a3a689b3a60009961a58853ffeb29fa57df56b5 100644 (file)
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -3777,6 +3777,7 @@ out:
 static int rtl8152_change_mtu(struct net_device *dev, int new_mtu)
 {
        struct r8152 *tp = netdev_priv(dev);
+       int ret;
 
        switch (tp->version) {
        case RTL_VER_01:
@@ -3789,9 +3790,22 @@ static int rtl8152_change_mtu(struct net_device *dev, int new_mtu)
        if (new_mtu < 68 || new_mtu > RTL8153_MAX_MTU)
                return -EINVAL;
 
+       ret = usb_autopm_get_interface(tp->intf);
+       if (ret < 0)
+               return ret;
+
+       mutex_lock(&tp->control);
+
        dev->mtu = new_mtu;
 
-       return 0;
+       if (netif_running(dev) && netif_carrier_ok(dev))
+               r8153_set_rx_early_size(tp);
+
+       mutex_unlock(&tp->control);
+
+       usb_autopm_put_interface(tp->intf);
+
+       return ret;
 }
 
 static const struct net_device_ops rtl8152_netdev_ops = {