[PATCH V2] arm_pmu: Drop redundant armpmu->map_event() in armpmu_event_init()

From: Anshuman Khandual
Date: Thu Dec 01 2022 - 20:56:27 EST


__hw_perf_event_init() already calls armpmu->map_event() callback, and also
returns its error code including -ENOENT, along with a debug callout. Hence
an additional armpmu->map_event() check for -ENOENT is redundant.

Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Acked-by: Mark Rutland <mark.rutland@xxxxxxx>
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
Changes in V2:

- Rebased on arm64 (for-next/perf)

Changes in V1:

https://lore.kernel.org/all/20221130083350.264583-1-anshuman.khandual@xxxxxxx/

drivers/perf/arm_pmu.c | 3 ---
1 file changed, 3 deletions(-)

diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index 3f07df5a7e95..ed89748b1612 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -514,9 +514,6 @@ static int armpmu_event_init(struct perf_event *event)
if (has_branch_stack(event))
return -EOPNOTSUPP;

- if (armpmu->map_event(event) == -ENOENT)
- return -ENOENT;
-
return __hw_perf_event_init(event);
}

--
2.25.1