From: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Wed, 8 Feb 2012 07:49:38 +0000 (+0000)
Subject: ixgbe: Address issues with Tx WHTRESH value not being set correctly
X-Git-Tag: v3.4-rc1~177^2~67
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e954b374b4e42c5335679ec6d79ca2c50ce5d422;p=pandora-kernel.git

ixgbe: Address issues with Tx WHTRESH value not being set correctly

This change is meant to address the fact that the tx_itr_setting was
dropping to 0 when no separate Tx vectors were provided.  This had resulted
in the driver incorrectly configuring the Tx ring with a WTHRESH of 1 in
order to avoid Tx hangs even though that was not necessary. This change
makes it so that we instead take a look at the Tx ring's q_vector to
determine if the ring will have an ITR value less than 8us.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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