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-rw-r--r--drivers/hwtracing/coresight/coresight-tmc-etf.c7
-rw-r--r--drivers/hwtracing/coresight/coresight-tmc-etr.c7
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c
index bc0efc1e5b49..b5e5e6ac67eb 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etf.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c
@@ -74,7 +74,12 @@ static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata)
CS_UNLOCK(drvdata->base);
tmc_flush_and_stop(drvdata);
- tmc_etb_dump_hw(drvdata);
+ /*
+ * When operating in sysFS mode the content of the buffer needs to be
+ * read before the TMC is disabled.
+ */
+ if (local_read(&drvdata->mode) == CS_MODE_SYSFS)
+ tmc_etb_dump_hw(drvdata);
tmc_disable_hw(drvdata);
CS_LOCK(drvdata->base);
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index 0c107811a232..7208584d0da7 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -76,7 +76,12 @@ static void tmc_etr_disable_hw(struct tmc_drvdata *drvdata)
CS_UNLOCK(drvdata->base);
tmc_flush_and_stop(drvdata);
- tmc_etr_dump_hw(drvdata);
+ /*
+ * When operating in sysFS mode the content of the buffer needs to be
+ * read before the TMC is disabled.
+ */
+ if (local_read(&drvdata->mode) == CS_MODE_SYSFS)
+ tmc_etr_dump_hw(drvdata);
tmc_disable_hw(drvdata);
CS_LOCK(drvdata->base);