From 325fb8e9aeddf7bf8a7a892869dca00e7305c41e Mon Sep 17 00:00:00 2001
From: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Date: Thu, 3 Dec 2009 07:45:15 +0000
Subject: [PATCH] eeepc-laptop: re-add check for eeepc->backlight == NULL

As Corentin points out, we do not create a backlight device if the ACPI
video driver is able to provide equivalent functionality. So we do need
to check before we try to update the backlight device.

We now ignore brightness events completely if we have not created a
backlight device.  This is slightly more cautious than the original
check.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Len Brown <len.brown@intel.com>
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