From 13f228da40cacdb3c4c23c8e1272c2ad37d1e4c0 Mon Sep 17 00:00:00 2001 From: Claudiu Manoil Date: Thu, 14 Feb 2013 05:00:06 +0000 Subject: [PATCH] gianfar: Remove wrong buffer size conditioning to VLAN h/w offload 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/freescale/gianfar.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index d70f74c634de..b2c60772bd96 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; -- 2.20.1