Pull cpu-hotplug into release branch

[sfrench/cifs-2.6.git] / drivers / acpi / processor_perflib.c

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index abbdb37a7f5f37e062f58800318d66b67a37c5d1..f36db22ce1aeb9b745ee815f6266779f31e98945 100644 (file)
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -577,6 +577,8 @@ acpi_processor_register_performance(struct acpi_processor_performance
                return_VALUE(-EBUSY);
        }
 
+       WARN_ON(!performance);
+
        pr->performance = performance;
 
        if (acpi_processor_get_performance_info(pr)) {
@@ -609,7 +611,8 @@ acpi_processor_unregister_performance(struct acpi_processor_performance
                return_VOID;
        }
 
-       kfree(pr->performance->states);
+       if (pr->performance)
+               kfree(pr->performance->states);
        pr->performance = NULL;
 
        acpi_cpufreq_remove_file(pr);