[PATCH 1/8] ALSA: hda: make snd_hdac_stream_clear() static

[Pierre-Louis Bossart]

This helper has no users outside of hdac_stream.c. External users
should only use snd_hdac_stream_start() and snd_hdac_stream_stop().

No functional change beyond making the function static and removing
the symbol export.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao at linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi at linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen at linux.intel.com>
---
 include/sound/hdaudio.h | 1 -
 sound/hda/hdac_stream.c | 5 ++---
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 6e74aeafeda41..24c731e53ccb6 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -561,7 +561,6 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 				unsigned int format_val);
 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
-void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
 void snd_hdac_stop_streams_and_chip(struct hdac_bus *bus);
 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index bdf6d4db67694..2dbde3d1cf683 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -112,10 +112,10 @@ void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start)
 EXPORT_SYMBOL_GPL(snd_hdac_stream_start);
 
 /**
- * snd_hdac_stream_clear - stop a stream DMA
+ * snd_hdac_stream_clear - helper to clear stream registers and stop DMA transfers
  * @azx_dev: HD-audio core stream to stop
  */
-void snd_hdac_stream_clear(struct hdac_stream *azx_dev)
+static void snd_hdac_stream_clear(struct hdac_stream *azx_dev)
 {
 	snd_hdac_stream_updateb(azx_dev, SD_CTL,
 				SD_CTL_DMA_START | SD_INT_MASK, 0);
@@ -124,7 +124,6 @@ void snd_hdac_stream_clear(struct hdac_stream *azx_dev)
 		snd_hdac_stream_updateb(azx_dev, SD_CTL_3B, SD_CTL_STRIPE_MASK, 0);
 	azx_dev->running = false;
 }
-EXPORT_SYMBOL_GPL(snd_hdac_stream_clear);
 
 /**
  * snd_hdac_stream_stop - stop a stream
-- 
2.34.1