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Commit a40318fb authored May 03, 2016 by Mathieu Poirier Committed by Greg Kroah-Hartman May 03, 2016

coresight: tmc: dump system memory content only when needed



Calling tmc_etf/etr_dump_hw() is required only when operating from
sysFS.  When working from Perf, the system memory is harvested
from the AUX trace API.

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

parent f2facc33

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

+6 −1

Original line number	Diff line number	Diff line
		@@ -74,6 +74,11 @@ static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata)
		CS_UNLOCK(drvdata->base);

		tmc_flush_and_stop(drvdata);
		/*
		* When operating in sysFS mode the content of the buffer needs to be
		* read before the TMC is disabled.
		*/
		if (local_read(&drvdata->mode) == CS_MODE_SYSFS)
		tmc_etb_dump_hw(drvdata);
		tmc_disable_hw(drvdata);

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

+6 −1

Original line number	Diff line number	Diff line
		@@ -76,6 +76,11 @@ static void tmc_etr_disable_hw(struct tmc_drvdata *drvdata)
		CS_UNLOCK(drvdata->base);

		tmc_flush_and_stop(drvdata);
		/*
		* When operating in sysFS mode the content of the buffer needs to be
		* read before the TMC is disabled.
		*/
		if (local_read(&drvdata->mode) == CS_MODE_SYSFS)
		tmc_etr_dump_hw(drvdata);
		tmc_disable_hw(drvdata);