[PATCH] staging: greybus: document codec mutex usage

["Bartłomiej Konecki" <bartekkonecki97@gmail.com>]

Add comments describing lock and register_mutex
in struct gbaudio_codec_info.
The lock protects the codec runtime state and module/DAI lists, while
register_mutex protects hardware registers.
Improve readability and clarify locking semantics.

Signed-off-by: Bartłomiej Konecki <bartekkonecki97@gmail.com>
---
 drivers/staging/greybus/audio_codec.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/greybus/audio_codec.h b/drivers/staging/greybus/audio_codec.h
index f3f7a7ec6be4..90dd3426d4a4 100644
--- a/drivers/staging/greybus/audio_codec.h
+++ b/drivers/staging/greybus/audio_codec.h
@@ -70,8 +70,9 @@ struct gbaudio_codec_info {
 	struct list_head module_list;
 	/* to maintain runtime stream params for each DAI */
 	struct list_head dai_list;
-	struct mutex lock;
+	struct mutex lock;	/* protects codec state and module/DAI lists */
 	struct mutex register_mutex;
+	/* serializes access to codec hardware registers*/
 };
 
 struct gbaudio_widget {
-- 
2.47.3