Merge 4.7-rc4 into staging-next

We want the fixes in here, and we can resolve a merge issue in
drivers/iio/industrialio-trigger.c

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index 847d1b5f2c13..688be9e060fc 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -300,13 +300,10 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata)
         if (local_read(&drvdata->mode) == CS_MODE_SYSFS) {
                 /*
                  * The trace run will continue with the same allocated trace
-                 * buffer. As such zero-out the buffer so that we don't end
-                 * up with stale data.
-                 *
-                 * Since the tracer is still enabled drvdata::buf
-                 * can't be NULL.
+                 * 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.
                  */
-                memset(drvdata->buf, 0, drvdata->size);
                 tmc_etr_enable_hw(drvdata);
         } else {
                 /*
@@ -315,7 +312,7 @@ int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata)
                  */
                 vaddr = drvdata->vaddr;
                 paddr = drvdata->paddr;
-                drvdata->buf = NULL;
+                drvdata->buf = drvdata->vaddr = NULL;
         }
 
         drvdata->reading = false;