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igb: Update MTU so that it is always at least a standard frame size 

This change makes it so that we limit the lower bound for max_frame_size to
the size of a standard Ethernet frame.  This allows for feature parity with
other Intel based drivers such as ixgbe.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2013-07-16 00:20:34 +00:00 committed by Jeff Kirsher
parent 5026719674
commit 2ccd994c4c
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/intel/igb/igb_main.c
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@ -4813,6 +4813,10 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
return -EINVAL;
}
/* adjust max frame to be at least the size of a standard frame */
if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
max_frame = ETH_FRAME_LEN + ETH_FCS_LEN;
while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
msleep(1);