coresight: etm4x: Remove redundant checks in PM save and restore

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ETMv4 driver save/restore callbacks still re-check conditions that are
already validated by the core layer before the callbacks are invoked.

Remove the duplicated checks and fold the two-level functions into
direct callback implementations.  The obsolete WARN_ON() checks are
removed as well.

Reviewed-by: Mike Leach <mike.leach@linaro.org>
Tested-by: James Clark <james.clark@linaro.org>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Tested-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20260515-arm_coresight_path_power_management_improvement-v14-13-f88c4a3ecfe9@arm.com

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Leo Yan 2026-05-15 21:08:20 +01:00 • committed by Suzuki K Poulose

parent 0f5e588c70

commit 81bf1c33f6

1 changed files with 4 additions and 37 deletions

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drivers/hwtracing/coresight/coresight-etm4x-core.c

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