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acpi-cpufreq: De-register CPU notifier and free struct msr on error. 

If cpufreq_register_driver() fails we would free the acpi driver
related structures but not free the ones allocated
by acpi_cpufreq_boost_init() function. This meant that as
the driver error-ed out and a CPU online/offline event came
we would crash and burn as one of the CPU notifiers would point
to garbage.

Fixes: cfc9c8ed03 (acpi-cpufreq: Adjust the code to use the common boost attribute)
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2014-01-27 22:50:35 -05:00 committed by Rafael J. Wysocki
parent 4f11b85a5f
commit eb8c68ef55
1 changed files with 4 additions and 3 deletions
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7
drivers/cpufreq/acpi-cpufreq.c
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@ -919,7 +919,7 @@ static void __init acpi_cpufreq_boost_init(void)
} }
} }
static void __exit acpi_cpufreq_boost_exit(void) static void acpi_cpufreq_boost_exit(void)
{ {
if (msrs) { if (msrs) {
unregister_cpu_notifier(&boost_nb); unregister_cpu_notifier(&boost_nb);
@ -969,9 +969,10 @@ static int __init acpi_cpufreq_init(void)
acpi_cpufreq_boost_init(); acpi_cpufreq_boost_init();
ret = cpufreq_register_driver(&acpi_cpufreq_driver); ret = cpufreq_register_driver(&acpi_cpufreq_driver);
if (ret) if (ret) {
free_acpi_perf_data(); free_acpi_perf_data();
acpi_cpufreq_boost_exit();
}
return ret; return ret;
} }