linux-stable/drivers/hwtracing
Yang Jihong 9e8db18eae hwtracing: hisi_ptt: Move type check to the beginning of hisi_ptt_pmu_event_init()
[ Upstream commit 06226d120a ]

When perf_init_event() calls perf_try_init_event() to init pmu driver,
searches for the next pmu driver only when the return value is -ENOENT.
Therefore, hisi_ptt_pmu_event_init() needs to check the type at the
beginning of the function.
Otherwise, in the case of perf-task mode, perf_try_init_event() returns
-EOPNOTSUPP and skips subsequent pmu drivers, causes perf_init_event() to
fail.

Fixes: ff0de066b4 ("hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device")
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Reviewed-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20240108121906.3514820-1-yangjihong1@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-03-26 18:17:30 -04:00
..
coresight coresight: etm4x: Set skip_power_up in etm4_init_arch_data function 2024-03-26 18:17:29 -04:00
intel_th Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
ptt hwtracing: hisi_ptt: Move type check to the beginning of hisi_ptt_pmu_event_init() 2024-03-26 18:17:30 -04:00
stm - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
Kconfig hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device 2022-09-08 16:26:17 -06:00