1 files changed, 2 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/power4-pmu.c b/arch/powerpc/kernel/power4-pmu.c
index db90b0c5c27b..3c90a3d9173e 100644
--- a/arch/powerpc/kernel/power4-pmu.c
+++ b/arch/powerpc/kernel/power4-pmu.c
@@ -606,7 +606,8 @@ static struct power_pmu power4_pmu = {
 
 static int init_power4_pmu(void)
 {
-        if (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power4"))
+        if (!cur_cpu_spec->oprofile_cpu_type ||
+            strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power4"))
                 return -ENODEV;
 
         return register_power_pmu(&power4_pmu);