hwtracing: hisi_ptt: Remove unnecessary trace buffer zeroing in trace_start()

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hisi_ptt_trace_start() clears all four trace buffers before enabling
tracing.

This is unnecessary. On trace stop, hisi_ptt_update_aux() copies only
the number of bytes reported in HISI_PTT_TRACE_WR_STS. On buffer-full
interrupts, it copies a full completed buffer. In both cases the driver
only consumes data written by hardware.

Remove the buffer clearing from the trace start path.

Signed-off-by: Sanman Pradhan <psanman@juniper.net>
Reviewed-by: Yicong Yang <yangyccccc@gmail.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20260414172451.14331-3-sanman.pradhan@hpe.com

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Sanman Pradhan 2026-04-14 17:25:22 +00:00 • committed by Suzuki K Poulose

parent 75d42d9903

commit 856119909d

1 changed files with 0 additions and 5 deletions

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drivers/hwtracing/ptt/hisi_ptt.c

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