1 files changed, 6 insertions, 4 deletions

diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index d53c0abc4dd3..8d8507858e5c 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -435,7 +435,7 @@ armpmu_reserve_hardware(void)
                         if (irq >= 0)
                                 free_irq(irq, NULL);
                 }
-                release_pmu(pmu_device);
+                release_pmu(ARM_PMU_DEVICE_CPU);
                 pmu_device = NULL;
         }
 
@@ -454,7 +454,7 @@ armpmu_release_hardware(void)
         }
         armpmu->stop();
 
-        release_pmu(pmu_device);
+        release_pmu(ARM_PMU_DEVICE_CPU);
         pmu_device = NULL;
 }
 
@@ -583,7 +583,7 @@ static int armpmu_event_init(struct perf_event *event)
 static void armpmu_enable(struct pmu *pmu)
 {
         /* Enable all of the perf events on hardware. */
-        int idx;
+        int idx, enabled = 0;
         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 
         if (!armpmu)
@@ -596,9 +596,11 @@ static void armpmu_enable(struct pmu *pmu)
                         continue;
 
                 armpmu->enable(&event->hw, idx);
+                enabled = 1;
         }
 
-        armpmu->start();
+        if (enabled)
+                armpmu->start();
 }
 
 static void armpmu_disable(struct pmu *pmu)