coresight: tmc-etr: Refactor for handling errors

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Refactor the tmc-etr enable operation to make it easier to
handle errors in enabling the hardware. We need to make
sure that the buffer is compatible with the ETR. This
patch re-arranges to make the error handling easier, by
deferring the hardware enablement until all the errors
are checked. This also avoids turning the CATU on/off
during a sysfs read session.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Suzuki K Poulose 2018-09-20 13:18:04 -06:00 • committed by Greg Kroah-Hartman

parent b9866bb168

commit 6276f9cba5

1 changed files with 43 additions and 24 deletions

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drivers/hwtracing/coresight/coresight-tmc-etr.c

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