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-rw-r--r--arch/powerpc/perf/core-book3s.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index fe52db2eea6..f82c0973866 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -1219,8 +1219,10 @@ static void power_pmu_enable(struct pmu *pmu)
}
/*
- * Compute MMCR* values for the new set of events
+ * Clear all MMCR settings and recompute them for the new set of events.
*/
+ memset(cpuhw->mmcr, 0, sizeof(cpuhw->mmcr));
+
if (ppmu->compute_mmcr(cpuhw->events, cpuhw->n_events, hwc_index,
cpuhw->mmcr)) {
/* shouldn't ever get here */