Commit 8be3556e authored by Yicong Yang's avatar Yicong Yang Committed by Ran Zhou
Browse files

hwtracing: hisi_ptt: Don't try to attach a task 

maillist inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I944FB
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7d52e2cfef91fc504b4ea7df88fb680fb0118cee



----------------------------------------------------------------------

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

Signed-off-by: default avatarYicong Yang <yangyicong@hisilicon.com>
Acked-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231010084731.30450-5-yangyicong@huawei.com


Signed-off-by: default avatarshiyongbang <shiyongbang@huawei.com>
parent af58ae3a

drivers/hwtracing/ptt/hisi_ptt.c

+3 −0
Original line number Diff line number Diff line
@@ -1006,6 +1006,9 @@ static int hisi_ptt_pmu_event_init(struct perf_event *event) 
		return -EOPNOTSUPP;

	}



	if (event->attach_state & PERF_ATTACH_TASK)

		return -EOPNOTSUPP;



	ret = hisi_ptt_trace_valid_filter(hisi_ptt, event->attr.config);

	if (ret < 0)

		return ret;