ixgbe: Fix RSC completion delay causing Rx interrupts to stop

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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>

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Peter P Waskiewicz Jr 2009-07-30 12:26:00 +00:00 • committed by David S. Miller

parent 0c19d6af92

commit 0a924578bc

2 changed files with 6 additions and 1 deletions

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2

drivers/net/ixgbe/ixgbe.h

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5

drivers/net/ixgbe/ixgbe_ethtool.c

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