From: Konrad Rzeszutek Wilk Date: Tue, 28 Jan 2014 03:50:35 +0000 (-0500) Subject: acpi-cpufreq: De-register CPU notifier and free struct msr on error. X-Git-Tag: v3.14-rc1~21^2^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eb8c68ef558e6cba241e7ada54f6b3427cb2bf68;p=kernel%2Fkernel-generic.git 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: cfc9c8ed03e4 (acpi-cpufreq: Adjust the code to use the common boost attribute) Acked-by: Lukasz Majewski Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 79e5608..18448a7 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -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) { unregister_cpu_notifier(&boost_nb); @@ -969,9 +969,10 @@ static int __init acpi_cpufreq_init(void) acpi_cpufreq_boost_init(); ret = cpufreq_register_driver(&acpi_cpufreq_driver); - if (ret) + if (ret) { free_acpi_perf_data(); - + acpi_cpufreq_boost_exit(); + } return ret; }