From f5c4fe5510d29b522298770314d38ba8b8d3a5dd Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 25 Apr 2013 09:29:17 -0400
Subject: [PATCH] drm/radeon: fix possible segfault when parsing pm tables

commit f8e6bfc2ce162855fa4f9822a45659f4b542c960 upstream.

If we have a empty power table, bail early and allocate
the default power state.

Should fix:
https://bugs.freedesktop.org/show_bug.cgi?id=63865

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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