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Commit 0f728a7f authored by Suzuki K Poulose's avatar Suzuki K Poulose Committed by Greg Kroah-Hartman
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coresight: tmc-etr: Do not clean trace buffer 



We zero out the entire trace buffer used for ETR before it is enabled,
for helping with debugging. With the addition of scatter-gather mode,
the buffer could be bigger and non-contiguous.

Get rid of this step; if someone wants to debug, they can always add it
as and when needed.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3495722a

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

+2 −6
Original line number Diff line number Diff line
@@ -13,9 +13,6 @@ static void tmc_etr_enable_hw(struct tmc_drvdata *drvdata) 
{

	u32 axictl, sts;



	/* Zero out the memory to help with debug */

	memset(drvdata->vaddr, 0, drvdata->size);



	CS_UNLOCK(drvdata->base);



	/* Wait for TMCSReady bit to be set */
@@ -340,9 +337,8 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata) 
	if (drvdata->mode == CS_MODE_SYSFS) {

		/*

		 * The trace run will continue with the same allocated trace

		 * buffer. The trace buffer is cleared in tmc_etr_enable_hw(),

		 * so we don't have to explicitly clear it. Also, since the

		 * tracer is still enabled drvdata::buf can't be NULL.

		 * buffer. Since the tracer is still enabled drvdata::buf can't

		 * be NULL.

		 */

		tmc_etr_enable_hw(drvdata);

	} else {