When syncing the cache, if the driver has given us a writable_register() callback, use it to check if we are syncing a non-writable register and if so warn the user.
Signed-off-by: Dimitris Papastamos dp@opensource.wolfsonmicro.com --- sound/soc/soc-cache.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c index 22c0b95..94a7ff8 100644 --- a/sound/soc/soc-cache.c +++ b/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;