From: Mitch Williams <mitch.a.williams@intel.com>
Date: Fri, 19 Jun 2015 15:56:30 +0000 (-0700)
Subject: i40evf: fix panic during MTU change
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~86^2~13^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=67c818a1d58c7897b8a6f531684516f9c236fe1b;p=pandora-kernel.git

i40evf: fix panic during MTU change

Down was requesting queue disables, but then exited immediately
without waiting for the queues to actually disable.  This could
allow any function called after i40evf_down to run immediately,
including i40evf_up, and causes a memory leak.

Removing the whole reinit_locked function is the best way
to go about this, and allows for the driver to handle the
state changes by requesting reset from the periodic timer.

Also, add a couple WARN_ONs in slow path to help us recognize
if we re-introduce this issue or missed any cases.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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