From: Mark Rustad <mark.d.rustad@intel.com>
Date: Wed, 15 Jan 2014 02:53:12 +0000 (-0800)
Subject: ixbge: Protect ixgbe_down with __IXGBE_DOWN bit
X-Git-Tag: v3.14-rc1~94^2~176^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3049c8f25bc1f43c7b948a4dbaaae84b0483136;p=pandora-kernel.git

ixbge: Protect ixgbe_down with __IXGBE_DOWN bit

The ixgbe_down function can now prevent multiple executions by
doing test_and_set_bit on __IXGBE_DOWN. This did not work before
introduction of the __IXGBE_REMOVING bit, because of overloading
of __IXGBE_DOWN. Also add smp_mb__before_clear_bit call before
clearing the __IXGBE_DOWN bit.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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