drivers: perf: Fix panic in riscv SBI mmap support

[platform/kernel/linux-starfive.git] / drivers / perf / riscv_pmu.c

diff --git a/drivers/perf/riscv_pmu.c b/drivers/perf/riscv_pmu.c
index 1f9a35f..0dda70e 100644 (file)
--- a/drivers/perf/riscv_pmu.c
+++ b/drivers/perf/riscv_pmu.c
@@ -23,7 +23,8 @@ static bool riscv_perf_user_access(struct perf_event *event)
        return ((event->attr.type == PERF_TYPE_HARDWARE) ||
                (event->attr.type == PERF_TYPE_HW_CACHE) ||
                (event->attr.type == PERF_TYPE_RAW)) &&
-               !!(event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT);
+               !!(event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT) &&
+               (event->hw.idx != -1);
 }
 
 void arch_perf_update_userpage(struct perf_event *event,