Re: [PATCH] perf tests: test_arm_coresight: Simplify source iteration

[Leo Yan]

On Mon, Oct 23, 2023 at 02:15:49PM +0100, James Clark wrote:
> There are two reasons to do this, firstly there is a shellcheck warning
> in cs_etm_dev_name(), which can be completely deleted. And secondly the
> current iteration method doesn't support systems with both ETE and ETM
> because it picks one or the other. There isn't a known system with this
> configuration, but it could happen in the future.
> 
> Iterating over all the sources for each CPU can be done by going through
> /sys/bus/event_source/devices/cs_etm/cpu* and following the symlink back
> to the Coresight device in /sys/bus/coresight/devices. This will work
> whether the device is ETE, ETM or any future name, and is much simpler
> and doesn't require any hard coded version numbers
> 
> Suggested-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> Signed-off-by: James Clark <james.clark@xxxxxxx>

Looks good to me.  And I did a test for it:

Tested-by: Leo Yan <leo.yan@xxxxxxxxxx>