1 files changed, 4 insertions, 1 deletions

diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index cd9b6d0b10bf..3fefebfbdf4b 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -2316,9 +2316,12 @@ static struct event_constraint *
 intel_get_event_constraints(struct cpu_hw_events *cpuc, int idx,
                             struct perf_event *event)
 {
-        struct event_constraint *c1 = cpuc->event_constraint[idx];
+        struct event_constraint *c1 = NULL;
         struct event_constraint *c2;
 
+        if (idx >= 0) /* fake does < 0 */
+                c1 = cpuc->event_constraint[idx];
+
         /*
          * first time only
          * - static constraint: no change across incremental scheduling calls