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cpufreq: Return error if ->get() failed in cpufreq_update_policy()

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cpufreq_update_policy() calls cpufreq_driver->get() to get current
frequency of a CPU and it is not supposed to fail or return zero.
Return error in case that happens.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2014-02-25 14:29:44 +05:30 committed by Rafael J. Wysocki
parent 52e7e81642
commit bd0fa9bb45
1 changed files with 5 additions and 0 deletions
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5
drivers/cpufreq/cpufreq.c
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@ -2139,6 +2139,11 @@ int cpufreq_update_policy(unsigned int cpu)
*/
if (cpufreq_driver->get) {
new_policy.cur = cpufreq_driver->get(cpu);
if (WARN_ON(!new_policy.cur)) {
ret = -EIO;
goto no_policy;
}
if (!policy->cur) {
pr_debug("Driver did not initialize current freq");
policy->cur = new_policy.cur;