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 and M3-W Salvator-X boards.
Signed-off-by: Ulrich Hecht <uli+renesas@xxxxxxxx>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
---
Hi!
This revision reverts the MTU change if re-opening the device fails.
CU
Uli
drivers/net/ethernet/renesas/ravb_main.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index ef8f089..402bcec 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1810,12 +1810,24 @@ 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)
{
+ unsigned int old_mtu = ndev->mtu;
+
if (netif_running(ndev))
- return -EBUSY;
+ ravb_close(ndev);
ndev->mtu = new_mtu;
netdev_update_features(ndev);
+ if (netif_running(ndev)) {
+ int err = ravb_open(ndev);
+
+ if (err) {
+ ndev->mtu = old_mtu;
+ netdev_update_features(ndev);
+ return err;
+ }
+ }
+
return 0;
}
--
2.7.4
