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be2net: bug fix in be_change_mtu
author
Ajit Khaparde
<ajitkhaparde@gmail.com>
Tue, 9 Feb 2010 01:32:43 +0000
(
01:32
+0000)
committer
David S. Miller
<davem@davemloft.net>
Fri, 12 Feb 2010 20:27:58 +0000
(12:27 -0800)
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>
drivers/net/benet/be_main.c
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diff --git
a/drivers/net/benet/be_main.c
b/drivers/net/benet/be_main.c
index 99061488eeb3f30078b55810a7a3dab0f1f08831..c65c63427d41a1c8930620adb426b20635a3a194 100644
(file)
--- 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",