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-rw-r--r--arch/x86/kernel/cpu/perf_event_amd.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index 573458f1caf..b87e0b6970c 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -348,10 +348,12 @@ static void amd_pmu_cpu_offline(int cpu)
raw_spin_lock(&amd_nb_lock);
- if (--cpuhw->amd_nb->refcnt == 0)
- kfree(cpuhw->amd_nb);
+ if (cpuhw->amd_nb) {
+ if (--cpuhw->amd_nb->refcnt == 0)
+ kfree(cpuhw->amd_nb);
- cpuhw->amd_nb = NULL;
+ cpuhw->amd_nb = NULL;
+ }
raw_spin_unlock(&amd_nb_lock);
}