diff options
| author |   Suzuki K Poulose <suzuki.poulose@arm.com> | 2016-08-25 15:18:57 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-31 13:05:42 +0200 |
| commit | 8505feaed9246791e94c30e8bf52fa4c3ef2e7af (patch) | |
| tree | f63d393a3a2fd4f20650342b11d182513904d4e5 /drivers/hwtracing/coresight/coresight-tmc-etf.c | |
| parent | coresight: Fix csdev connections initialisation (diff) | |
| download | linux-dev-8505feaed9246791e94c30e8bf52fa4c3ef2e7af.tar.xz linux-dev-8505feaed9246791e94c30e8bf52fa4c3ef2e7af.zip | |
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-etf.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc-etf.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c index 466af86fd76f..e68289b8c072 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etf.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c @@ -48,6 +48,7 @@ static void tmc_etb_dump_hw(struct tmc_drvdata *drvdata) int i; bufp = drvdata->buf; + drvdata->len = 0; while (1) { for (i = 0; i < drvdata->memwidth; i++) { read_data = readl_relaxed(drvdata->base + TMC_RRD); @@ -55,6 +56,7 @@ static void tmc_etb_dump_hw(struct tmc_drvdata *drvdata) return; memcpy(bufp, &read_data, 4); bufp += 4; + drvdata->len += 4; } } } |