From 0a924578bc4a2823a95c151f56975c71f5c156bb Mon Sep 17 00:00:00 2001 From: Peter P Waskiewicz Jr Date: Thu, 30 Jul 2009 12:26:00 +0000 Subject: ixgbe: Fix RSC completion delay causing Rx interrupts to stop When a user disables interrupt throttling with ethtool on 82599 devices, the interrupt timer may not be re-enabled if hardware RSC is running. The RSC completions in hardware don't complete before the next ITR event tries to fire, so the ITR timer never gets re-armed. This patch increases the amount of time between interrupts when throttling is disabled (rx-usecs = 0) when the hardware RSC deature is enabled. Signed-off-by: Peter P Waskiewicz Jr Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/ixgbe/ixgbe_ethtool.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/net/ixgbe/ixgbe_ethtool.c') diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c index 7ddb50c03f0..79144e950a3 100644 --- a/drivers/net/ixgbe/ixgbe_ethtool.c +++ b/drivers/net/ixgbe/ixgbe_ethtool.c @@ -1975,7 +1975,10 @@ static int ixgbe_set_coalesce(struct net_device *netdev, * any other value means disable eitr, which is best * served by setting the interrupt rate very high */ - adapter->eitr_param = IXGBE_MAX_INT_RATE; + if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) + adapter->eitr_param = IXGBE_MAX_RSC_INT_RATE; + else + adapter->eitr_param = IXGBE_MAX_INT_RATE; adapter->itr_setting = 0; } -- cgit v1.2.3