From 34a89b8c75abe2873a95524552cc266fdd3b6a85 Mon Sep 17 00:00:00 2001 From: Ajit Khaparde Date: Tue, 9 Feb 2010 01:32:43 +0000 Subject: [PATCH] be2net: bug fix in be_change_mtu Current code allows the new mtu to cross the supported value. This patch fixes the boundary checks. From: Suresh R Signed-off-by: Ajit Khaparde Signed-off-by: David S. Miller --- drivers/net/benet/be_main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c index 99061488eeb3..c65c63427d41 100644 --- a/drivers/net/benet/be_main.c +++ b/drivers/net/benet/be_main.c @@ -473,10 +473,12 @@ static int be_change_mtu(struct net_device *netdev, int new_mtu) { struct be_adapter *adapter = netdev_priv(netdev); if (new_mtu < BE_MIN_MTU || - new_mtu > BE_MAX_JUMBO_FRAME_SIZE) { + new_mtu > (BE_MAX_JUMBO_FRAME_SIZE - + (ETH_HLEN + ETH_FCS_LEN))) { dev_info(&adapter->pdev->dev, "MTU must be between %d and %d bytes\n", - BE_MIN_MTU, BE_MAX_JUMBO_FRAME_SIZE); + BE_MIN_MTU, + (BE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN))); return -EINVAL; } dev_info(&adapter->pdev->dev, "MTU changed from %d to %d bytes\n", -- 2.20.1