@@ -24,9 +24,6 @@ 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 */
@@ -352,9 +349,8 @@ 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 {
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: Suzuki K Poulose <suzuki.poulose@arm.com> --- drivers/hwtracing/coresight/coresight-tmc-etr.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)