Commit 0f728a7f authored by Suzuki K Poulose's avatar Suzuki K Poulose Committed by Greg Kroah-Hartman

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
...@@ -13,9 +13,6 @@ static void tmc_etr_enable_hw(struct tmc_drvdata *drvdata) ...@@ -13,9 +13,6 @@ static void tmc_etr_enable_hw(struct tmc_drvdata *drvdata)
{ {
u32 axictl, sts; u32 axictl, sts;
/* Zero out the memory to help with debug */
memset(drvdata->vaddr, 0, drvdata->size);
CS_UNLOCK(drvdata->base); CS_UNLOCK(drvdata->base);
/* Wait for TMCSReady bit to be set */ /* Wait for TMCSReady bit to be set */
...@@ -340,9 +337,8 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata) ...@@ -340,9 +337,8 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata)
if (drvdata->mode == CS_MODE_SYSFS) { if (drvdata->mode == CS_MODE_SYSFS) {
/* /*
* The trace run will continue with the same allocated trace * The trace run will continue with the same allocated trace
* buffer. The trace buffer is cleared in tmc_etr_enable_hw(), * buffer. Since the tracer is still enabled drvdata::buf can't
* so we don't have to explicitly clear it. Also, since the * be NULL.
* tracer is still enabled drvdata::buf can't be NULL.
*/ */
tmc_etr_enable_hw(drvdata); tmc_etr_enable_hw(drvdata);
} else { } else {
......
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