ASoC: Remove reg_def_copy

reg_def_copy was introduced in commit 3335ddca ("ASoC: soc-cache: Use
reg_def_copy instead of reg_cache_default") to keep a copy of the register
defaults around in case the register defaults where placed in the __devinitdata
section. With the __devinitdata section gone we effectivly keep the same data
around twice. This patch removes reg_def_copy and uses reg_cache_default
directly instead.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

include/sound/soc.h

@@ -687,7 +687,6 @@ struct snd_soc_codec {
 	unsigned int (*read)(struct snd_soc_codec *, unsigned int);
 	int (*write)(struct snd_soc_codec *, unsigned int, unsigned int);
 	void *reg_cache;
-	const void *reg_def_copy;
 	const struct snd_soc_cache_ops *cache_ops;
 	struct mutex cache_rw_mutex;
 	int val_bytes;

sound/soc/soc-cache.c

@@ -78,8 +78,8 @@ static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
 		ret = snd_soc_cache_read(codec, i, &val);
 		if (ret)
 			return ret;
-		if (codec->reg_def_copy)
-			if (snd_soc_get_cache_val(codec->reg_def_copy,
+		if (codec_drv->reg_cache_default)
+			if (snd_soc_get_cache_val(codec_drv->reg_cache_default,
 						  i, codec_drv->reg_word_size) == val)
 				continue;
 
@@ -121,8 +121,10 @@ static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec)
 
 static int snd_soc_flat_cache_init(struct snd_soc_codec *codec)
 {
-	if (codec->reg_def_copy)
-		codec->reg_cache = kmemdup(codec->reg_def_copy,
+	const struct snd_soc_codec_driver *codec_drv = codec->driver;
+
+	if (codec_drv->reg_cache_default)
+		codec->reg_cache = kmemdup(codec_drv->reg_cache_default,
 					   codec->reg_size, GFP_KERNEL);
 	else
 		codec->reg_cache = kzalloc(codec->reg_size, GFP_KERNEL);

sound/soc/soc-core.c

@@ -4201,20 +4201,6 @@ int snd_soc_register_codec(struct device *dev,
 	if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
 		reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
 		codec->reg_size = reg_size;
-		/* it is necessary to make a copy of the default register cache
-		 * because in the case of using a compression type that requires
-		 * the default register cache to be marked as the
-		 * kernel might have freed the array by the time we initialize
-		 * the cache.
-		 */
-		if (codec_drv->reg_cache_default) {
-			codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
-						      reg_size, GFP_KERNEL);
-			if (!codec->reg_def_copy) {
-				ret = -ENOMEM;
-				goto fail_codec_name;
-			}
-		}
 	}
 
 	for (i = 0; i < num_dai; i++) {
@@ -4273,7 +4259,6 @@ void snd_soc_unregister_codec(struct device *dev)
 	dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", codec->name);
 
 	snd_soc_cache_exit(codec);
-	kfree(codec->reg_def_copy);
 	kfree(codec->name);
 	kfree(codec);
 }