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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-07-11 13:40:16 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-15 13:52:56 +0200 |
| commit | 0f728a7f9f8fed5dfd86a628d871d572cb91942c (patch) | |
| tree | e28eddb84fce3b9f82d8b126e0b22bf32b40b854 /drivers/hwtracing | |
| parent | 3495722a0093c80f66c020f90161983b46a1f5ee (diff) | |
| download | linux-stable-0f728a7f9f8fed5dfd86a628d871d572cb91942c.tar.gz linux-stable-0f728a7f9f8fed5dfd86a628d871d572cb91942c.tar.bz2 linux-stable-0f728a7f9f8fed5dfd86a628d871d572cb91942c.zip | |
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: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc-etr.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c index f88342d400ef..1de05c9a01c8 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c @@ -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 { |