| Message ID | 1360854007-11094-7-git-send-email-claudiu.manoil@freescale.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index d70f74c..b2c6077 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -2385,9 +2385,6 @@ static int gfar_change_mtu(struct net_device *dev, int new_mtu) int oldsize = priv->rx_buffer_size; int frame_size = new_mtu + ETH_HLEN; - if (gfar_is_vlan_on(priv)) - frame_size += VLAN_HLEN; - if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) { netif_err(priv, drv, dev, "Invalid MTU setting\n"); return -EINVAL;
The controller's ref manual states clearly that when the hw Rx vlan offload feature is enabled, meaning that the VLEX bit from RCTRL is correctly enabled, then the hw performs automatic VLAN tag extraction and deletion from the ethernet frames. So there's no point in trying to increase the rx buff size when rxvlan is on, as the frame is actually smaller. And the Tx vlan hw accel feature (VLINS) has nothing to do with rx buff size computation. Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> --- drivers/net/ethernet/freescale/gianfar.c | 3 --- 1 files changed, 0 insertions(+), 3 deletions(-)