From: Alexander Duyck Date: Tue, 16 Jul 2013 00:20:34 +0000 (+0000) Subject: igb: Update MTU so that it is always at least a standard frame size X-Git-Tag: v3.12-rc1~132^2~206^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2ccd994c4c85a787ba4873f1481edd42c4ff46bf;p=profile%2Fcommon%2Fkernel-common.git 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 Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 94295a0..1a0137d 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -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);