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| /openbmc/linux/drivers/hwtracing/ptt/ |
| H A D | hisi_ptt.c | 359d3fbc Tue Oct 10 03:47:31 CDT 2023 Junhao He <hejunhao3@huawei.com> hwtracing: hisi_ptt: Add dummy callback pmu::read()
[ Upstream commit 55e0a2fb0cb5ab7c9c99c1ad4d3e6954de8b73a0 ]
When start trace with perf option "-C $cpu" and immediately stop it
with SIGTERM or others, the perf core will invoke pmu::read() while
the driver doesn't implement it. Add a dummy pmu::read() to avoid
any issues.
Fixes: ff0de066b463 ("hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device")
Signed-off-by: Junhao He <hejunhao3@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231010084731.30450-6-yangyicong@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
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