From: Mark Rustad <mark.d.rustad@intel.com>
Date: Tue, 4 Mar 2014 03:02:18 +0000 (+0000)
Subject: ixgbevf: Protect ixgbevf_down with __IXGBEVF_DOWN bit
X-Git-Tag: v3.15-rc1~113^2~124^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b346dc97567270a5c0f02a390a1d1bb65237cea;p=pandora-kernel.git

ixgbevf: Protect ixgbevf_down with __IXGBEVF_DOWN bit

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

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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