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 <sureshr@serverengines.com>
Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 9906148..c65c634 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -473,10 +473,12 @@
{
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",