[CPUFREQ] acpi-cpufreq: add error handling for cpufreq_register_driver() error

add error handling for cpufreq_register_driver() error

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: cpufreq@lists.linux.org.uk
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index dd097b835839..1def5b06fa4a 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -785,7 +785,11 @@ static int __init acpi_cpufreq_init(void)
         if (ret)
                 return ret;
 
-        return cpufreq_register_driver(&acpi_cpufreq_driver);
+        ret = cpufreq_register_driver(&acpi_cpufreq_driver);
+        if (ret)
+                free_percpu(acpi_perf_data);
+
+        return ret;
 }
 
 static void __exit acpi_cpufreq_exit(void)
@@ -795,8 +799,6 @@ static void __exit acpi_cpufreq_exit(void)
         cpufreq_unregister_driver(&acpi_cpufreq_driver);
 
         free_percpu(acpi_perf_data);
-
-        return;
 }
 
 module_param(acpi_pstate_strict, uint, 0644);