From: Pan Xinhui <xinhuix.pan@intel.com>
Date: Fri, 10 Jul 2015 06:36:20 +0000 (+0800)
Subject: acpi-cpufreq: Fix an ACPI perf unregister issue
X-Git-Tag: omap-for-v4.3/fixes-rc1~121^2~4^2~31^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8cfcfd39000d;p=pandora-kernel.git

acpi-cpufreq: Fix an ACPI perf unregister issue

As policy->cpu may not be same in acpi_cpufreq_cpu_init() and
acpi_cpufreq_cpu_exit(). There is a risk that we use different CPU
to un/register ACPI performance. So acpi_processor_unregister_performance()
may not be able to do the cleanup work. That causes a memory leak. And
if there will be another acpi_processor_register_performance() call,
it may also fail thanks to the internal check of pr->performace.

So add a new struct acpi_cpufreq_data field, acpi_perf_cpu, to fix
this issue.

Signed-off-by: Pan Xinhui <xinhuix.pan@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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