From: Dirk Brandewie <dirk.brandewie@gmail.com>
Date: Tue, 5 Mar 2013 22:15:26 +0000 (-0800)
Subject: cpufreq / intel_pstate: Do not load on VM that does not report max P state.
X-Git-Tag: v3.9-rc2~16^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3929b832833db870af72479666fa4e4d043e02e;p=pandora-kernel.git

cpufreq / intel_pstate: Do not load on VM that does not report max P state.

It seems some VMs support the P state MSRs but return zeros. Fail
gracefully if we are running in this environment.

References: https://bugzilla.redhat.com/show_bug.cgi?id=916833
Reported-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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