[PATCH] USB: minor gadget/rndis tweak

Resove a minor FIXME:  don't change MTU while RNDIS link is active,
the other end won't expect such things...

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index afc84cfb61f9..04b9743c1c1f 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -1549,7 +1549,8 @@ static int eth_change_mtu (struct net_device *net, int new_mtu)
 {
         struct eth_dev  *dev = netdev_priv(net);
 
-        // FIXME if rndis, don't change while link's live
+        if (dev->rndis)
+                return -EBUSY;
 
         if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
                 return -ERANGE;