e1000/e1000e: implement a simple interrupt moderation

[safe/jmp/linux-2.6] / drivers / net / e1000 / e1000_ethtool.c

diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index d6931ca..2a3b2dc 100644 (file)
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -1808,7 +1808,7 @@ static int e1000_get_coalesce(struct net_device *netdev,
        if (adapter->hw.mac_type < e1000_82545)
                return -EOPNOTSUPP;
 
-       if (adapter->itr_setting <= 3)
+       if (adapter->itr_setting <= 4)
                ec->rx_coalesce_usecs = adapter->itr_setting;
        else
                ec->rx_coalesce_usecs = 1000000 / adapter->itr_setting;
@@ -1826,12 +1826,14 @@ static int e1000_set_coalesce(struct net_device *netdev,
                return -EOPNOTSUPP;
 
        if ((ec->rx_coalesce_usecs > E1000_MAX_ITR_USECS) ||
-           ((ec->rx_coalesce_usecs > 3) &&
+           ((ec->rx_coalesce_usecs > 4) &&
             (ec->rx_coalesce_usecs < E1000_MIN_ITR_USECS)) ||
            (ec->rx_coalesce_usecs == 2))
                return -EINVAL;
 
-       if (ec->rx_coalesce_usecs <= 3) {
+       if (ec->rx_coalesce_usecs == 4) {
+               adapter->itr = adapter->itr_setting = 4;
+       } else if (ec->rx_coalesce_usecs <= 3) {
                adapter->itr = 20000;
                adapter->itr_setting = ec->rx_coalesce_usecs;
        } else {