ARM: 7356/1: perf: check that we have an event in the PMU IRQ handlers

[karo-tx-linux.git] / arch / arm / kernel / perf_event_v6.c

diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
index 88bf15253fbd33a18074b995a8e3d54a0f8bbb4b..b78af0cc6ef36ddf8b371c9b57541b19caab5677 100644 (file)
--- a/arch/arm/kernel/perf_event_v6.c
+++ b/arch/arm/kernel/perf_event_v6.c
@@ -467,23 +467,6 @@ armv6pmu_enable_event(struct hw_perf_event *hwc,
        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
 }
 
-static int counter_is_active(unsigned long pmcr, int idx)
-{
-       unsigned long mask = 0;
-       if (idx == ARMV6_CYCLE_COUNTER)
-               mask = ARMV6_PMCR_CCOUNT_IEN;
-       else if (idx == ARMV6_COUNTER0)
-               mask = ARMV6_PMCR_COUNT0_IEN;
-       else if (idx == ARMV6_COUNTER1)
-               mask = ARMV6_PMCR_COUNT1_IEN;
-
-       if (mask)
-               return pmcr & mask;
-
-       WARN_ONCE(1, "invalid counter number (%d)\n", idx);
-       return 0;
-}
-
 static irqreturn_t
 armv6pmu_handle_irq(int irq_num,
                    void *dev)
@@ -513,7 +496,8 @@ armv6pmu_handle_irq(int irq_num,
                struct perf_event *event = cpuc->events[idx];
                struct hw_perf_event *hwc;
 
-               if (!counter_is_active(pmcr, idx))
+               /* Ignore if we don't have an event. */
+               if (!event)
                        continue;
 
                /*