When adding an event to the PMU with PERF_EF_START the STOPPED and UPTODATE
flags need to be cleared in the hw.event status variable because they are
preventing the update of the event count on overflow interrupt.
Signed-off-by: Alexandru-Cezar Sardan <alexandru.sar...@freescale.com>
---
arch/powerpc/perf/core-fsl-emb.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/perf/core-fsl-emb.c b/arch/powerpc/perf/core-fsl-emb.c
index d35ae52..ef2ce48 100644
--- a/arch/powerpc/perf/core-fsl-emb.c
+++ b/arch/powerpc/perf/core-fsl-emb.c
@@ -330,9 +330,11 @@ static int fsl_emb_pmu_add(struct perf_event *event, int
flags)
}
local64_set(&event->hw.prev_count, val);
- if (!(flags & PERF_EF_START)) {
+ if (unlikely(!(flags & PERF_EF_START))) {
event->hw.state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
val = 0;
+ } else {
+ event->hw.state &= ~(PERF_HES_STOPPED | PERF_HES_UPTODATE);
}
write_pmc(i, val);
--
1.7.9.5
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