[alsa-devel] [PATCH 2/2] ASoC: soc-cache: Warn on syncing any non-writable registers
Dimitris Papastamos
dp at opensource.wolfsonmicro.com
Mon Mar 28 12:34:42 CEST 2011
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 at 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;
--
1.7.4.1
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