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cpufreq: prevent lockup on reading scaling_available_frequencies

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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 <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Srinivas Pandruvada 2015-10-07 13:50:44 -07:00 • committed by Rafael J. Wysocki
commit 55582bccdc
1 changed files with 3 additions and 1 deletions
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4
drivers/cpufreq/cpufreq.c
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@ -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;
}
}
/**