From: Jakub Kicinski <kubakici@wp.pl>
Date: Sat, 15 Mar 2014 14:55:21 +0000 (+0000)
Subject: ixgbe: fix race conditions on queuing skb for HW time stamp
X-Git-Tag: v3.15-rc1~113^2~16^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=151b260c624d47b2c78b2f887e4f791c09c73c17;p=pandora-kernel.git

ixgbe: fix race conditions on queuing skb for HW time stamp

ixgbe has a single set of TX time stamping resources per NIC.
Use a simple bit lock to avoid race conditions and leaking skbs
when multiple TX rings try to claim time stamping.

Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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