From: Jakub Kicinski <kubakici@wp.pl>
Date: Sat, 15 Mar 2014 14:55:42 +0000 (+0000)
Subject: i40e: fix race conditions on queuing skb for HW time stamp
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~149^2~139^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ce34f023d6025af89087472f0327e0a81073167;p=pandora-kernel.git

i40e: fix race conditions on queuing skb for HW time stamp

i40e 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: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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