ixgbe: Fix RSC completion delay causing Rx interrupts to stop
authorPeter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Thu, 30 Jul 2009 12:26:00 +0000 (12:26 +0000)
committerDavid S. Miller <davem@davemloft.net>
Fri, 31 Jul 2009 02:00:30 +0000 (19:00 -0700)
commit0a924578bc4a2823a95c151f56975c71f5c156bb
tree58af9e5303f5c5d552541290a5194b0d743cd1bd
parent0c19d6af9253f19b41821c29b9c49c2214f19425
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 <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ixgbe/ixgbe.h
drivers/net/ixgbe/ixgbe_ethtool.c