diff --git a/[refs] b/[refs]
index 9086bd85ecab..43b9dd3865b6 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fbda18245beff52ec1edf096e7a77d4cdf3effb9
+refs/heads/master: f20eda5d8fafe35ca3c63ec8149a700a7db228a5
diff --git a/trunk/sound/soc/soc-cache.c b/trunk/sound/soc/soc-cache.c
index 22c0b95fb007..22b099076223 100644
--- a/trunk/sound/soc/soc-cache.c
+++ b/trunk/sound/soc/soc-cache.c
@@ -661,6 +661,8 @@ static int snd_soc_rbtree_cache_sync(struct snd_soc_codec *codec)
 		rbnode = rb_entry(node, struct snd_soc_rbtree_node, node);
 		if (rbnode->value == rbnode->defval)
 			continue;
+		WARN_ON(codec->writable_register &&
+			codec->writable_register(codec, rbnode->reg));
 		ret = snd_soc_cache_read(codec, rbnode->reg, &val);
 		if (ret)
 			return ret;
@@ -921,6 +923,8 @@ static int snd_soc_lzo_cache_sync(struct snd_soc_codec *codec)
 
 	lzo_blocks = codec->reg_cache;
 	for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) {
+		WARN_ON(codec->writable_register &&
+			codec->writable_register(codec, i));
 		ret = snd_soc_cache_read(codec, i, &val);
 		if (ret)
 			return ret;
@@ -1179,6 +1183,8 @@ static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
 
 	codec_drv = codec->driver;
 	for (i = 0; i < codec_drv->reg_cache_size; ++i) {
+		WARN_ON(codec->writable_register &&
+			codec->writable_register(codec, i));
 		ret = snd_soc_cache_read(codec, i, &val);
 		if (ret)
 			return ret;