Commit 8013f32a authored Apr 25, 2019 by Mathieu Poirier Committed by Greg Kroah-Hartman Apr 25, 2019

coresight: etm4x: Skip selector pair 0



Resource selector pair 0 is always implemented and reserved.  As such
it should not be explicitly programmed.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Robert Walker <robert.walker@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 82500a81

drivers/hwtracing/coresight/coresight-etm4x.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -138,8 +138,11 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata)
		drvdata->base + TRCCNTVRn(i));
		}

		/* Resource selector pair 0 is always implemented and reserved */
		for (i = 0; i < drvdata->nr_resource * 2; i++)
		/*
		* Resource selector pair 0 is always implemented and reserved. As
		* such start at 2.
		*/
		for (i = 2; i < drvdata->nr_resource * 2; i++)
		writel_relaxed(config->res_ctrl[i],
		drvdata->base + TRCRSCTLRn(i));

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