[CPUFREQ] Fix use after free of struct powernow_k8_data

[safe/jmp/linux-2.6] / arch / x86 / kernel / cpu / cpufreq / powernow-k8.c

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index a9df944..2da4fa3 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -1356,6 +1356,7 @@ static int __devexit powernowk8_cpu_exit(struct cpufreq_policy *pol)
 
        kfree(data->powernow_table);
        kfree(data);
+       per_cpu(powernow_data, pol->cpu) = NULL;
 
        return 0;
 }
@@ -1375,7 +1376,7 @@ static unsigned int powernowk8_get(unsigned int cpu)
        int err;
 
        if (!data)
-               return -EINVAL;
+               return 0;
 
        smp_call_function_single(cpu, query_values_on_cpu, &err, true);
        if (err)