coresight: etm3x: Fix cntr_val_show() to match cntr_val_store() behavior

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The cntr_val_show() function was intended to print the values of all
counters using a loop. However, due to a buffer overwrite issue with
sprintf(), it effectively only displayed the value of the last counter.

The companion function, cntr_val_store(), allows users to modify a
specific counter selected by 'cntr_idx'. To maintain consistency
between read and write operations and to align with the ETM4x driver
behavior, modify cntr_val_show() to report only the value of the
currently selected counter.

This change removes the loop and the "counter %d:" prefix, printing
only the hexadecimal value. It also adopts sysfs_emit() for standard
sysfs output formatting.

Fixes: a939fc5a71 ("coresight-etm: add CoreSight ETM/PTM driver")
Cc: stable@vger.kernel.org
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20251202082613.3265761-1-visitorckw@gmail.com

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Kuan-Wei Chiu 2025-12-02 08:26:13 +00:00 • committed by Suzuki K Poulose

parent 8cdeaa50ea

commit 41fb4e9255

1 changed files with 4 additions and 11 deletions

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drivers/hwtracing/coresight/coresight-etm3x-sysfs.c

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