Uses the same method as various other drivers: shut the device down, change the MTU, then bring it back up again.
Tested on Renesas D3 Draak board. Signed-off-by: Ulrich Hecht <[email protected]> Reviewed-by: Niklas Söderlund <[email protected]> --- Hi! This revision incorporates Simon's and Sergei's suggestions, namely calling netdev_update_features() whether the device is up or not. Thanks to reviewers! CU Uli drivers/net/ethernet/renesas/ravb_main.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index ef8f089..00427e7 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1811,11 +1811,14 @@ static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) static int ravb_change_mtu(struct net_device *ndev, int new_mtu) { if (netif_running(ndev)) - return -EBUSY; + ravb_close(ndev); ndev->mtu = new_mtu; netdev_update_features(ndev); + if (netif_running(ndev)) + return ravb_open(ndev); + return 0; } -- 2.7.4
