From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Fri, 5 Nov 2010 19:16:36 +0000 (-0400)
Subject: PCI: read current power state at enable time
X-Git-Tag: v2.6.37-rc2~5^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=97c145f7c87453cec90e91238fba5fe2c1561b32;p=pandora-kernel.git

PCI: read current power state at enable time

When we enable a PCI device, we avoid doing a lot of the initial setup
work if the device's enable count is non-zero.  If we don't fetch the
power state though, we may later fail to set up MSI due to the unknown
status.  So pick it up before we short circuit the rest due to a
pre-existing enable or mismatched enable/disable pair (as happens with
VGA devices, which are special in a special way).

Tested-by: Jesse Brandeburg <jesse.brandeburg@gmail.com>
Reported-by: Dave Airlie <airlied@linux.ie>
Tested-by: Dave Airlie <airlied@linux.ie>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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