diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2016-08-25 21:18:57 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-31 11:05:42 (GMT) |
| commit | 8505feaed9246791e94c30e8bf52fa4c3ef2e7af (patch) | |
| tree | f63d393a3a2fd4f20650342b11d182513904d4e5 /drivers/hwtracing/coresight/coresight-tmc-etr.c | |
| parent | 068c0a542f6edce90f7d8a9b35a849d990001018 (diff) | |
| download | linux-8505feaed9246791e94c30e8bf52fa4c3ef2e7af.tar.xz | |
coresight: tmc: Limit the trace to available data
At present the ETF or ETR gives out the entire device
buffer, even if there is less or even no trace data
available. This patch limits the trace data given out to
the actual trace data collected.
Cc: 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/coresight/coresight-tmc-etr.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc-etr.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c index 688be9e..03f36cb 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c @@ -64,11 +64,17 @@ static void tmc_etr_dump_hw(struct tmc_drvdata *drvdata) rwp = readl_relaxed(drvdata->base + TMC_RWP); val = readl_relaxed(drvdata->base + TMC_STS); - /* How much memory do we still have */ - if (val & BIT(0)) + /* + * Adjust the buffer to point to the beginning of the trace data + * and update the available trace data. + */ + if (val & BIT(0)) { drvdata->buf = drvdata->vaddr + rwp - drvdata->paddr; - else + drvdata->len = drvdata->size; + } else { drvdata->buf = drvdata->vaddr; + drvdata->len = rwp - drvdata->paddr; + } } static void tmc_etr_disable_hw(struct tmc_drvdata *drvdata) |