Commit 55582bcc authored Oct 07, 2015 by Srinivas Pandruvada Committed by Rafael J. Wysocki Oct 08, 2015

cpufreq: prevent lockup on reading scaling_available_frequencies



When scaling_available_frequencies is read on an offlined cpu, then
either lockup or junk values are displayed. This is caused by
freed freq_table, which policy is using.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent e2530367

drivers/cpufreq/cpufreq.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1436,8 +1436,10 @@ static void cpufreq_offline_finish(unsigned int cpu)
		* since this is a core component, and is essential for the
		* subsequent light-weight ->init() to succeed.
		*/
		if (cpufreq_driver->exit)
		if (cpufreq_driver->exit) {
		cpufreq_driver->exit(policy);
		policy->freq_table = NULL;
		}
		}

		/**