[PATCH 4/5] hwtracing: hisi_ptt: Don't try to attach a task

Yicong Yang
2023-08-09T08:20:53Z

From: Yicong Yang <yangyicong@hisilicon.com>

PTT is an uncore PMU and shouldn't be attached to any task. Block
the usage in pmu::event_init().

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
drivers/hwtracing/ptt/hisi_ptt.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_ptt.c
index 3aba7bb6e548..916686c6a9c8 100644
--- a/drivers/hwtracing/ptt/hisi_ptt.c
+++ b/drivers/hwtracing/ptt/hisi_ptt.c
@@ -1003,6 +1003,9 @@ static int hisi_ptt_pmu_event_init(struct perf_event *event)
return -EOPNOTSUPP;
}

+ if (event->attach_state & PERF_ATTACH_TASK)
+ return -EOPNOTSUPP;
+
if (event->attr.type != hisi_ptt->hisi_ptt_pmu.type)
return -ENOENT;

--
2.24.0