[RFT][PATCH 2/2] ASoC: rt298: Make rt298_index_def const

[Axel Lin <axel.lin@ingics.com>]

The index_cache is per instance run time state but rt298_index_def is not.
Make rt298_index_def const and make a copy of memory for index_cache rather
than directly use the rt298_index_def.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
 sound/soc/codecs/rt298.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/rt298.c b/sound/soc/codecs/rt298.c
index 2a6c2ba..83bbc62 100644
--- a/sound/soc/codecs/rt298.c
+++ b/sound/soc/codecs/rt298.c
@@ -48,7 +48,7 @@ struct rt298_priv {
 	int is_hp_in;
 };
 
-static struct reg_default rt298_index_def[] = {
+static const struct reg_default rt298_index_def[] = {
 	{ 0x01, 0xaaaa },
 	{ 0x02, 0x8aaa },
 	{ 0x03, 0x0002 },
@@ -1164,7 +1164,11 @@ static int rt298_i2c_probe(struct i2c_client *i2c,
 		return -ENODEV;
 	}
 
-	rt298->index_cache = rt298_index_def;
+	rt298->index_cache = devm_kmemdup(&i2c->dev, rt298_index_def,
+					  sizeof(rt298_index_def), GFP_KERNEL);
+	if (!rt298->index_cache)
+		return -ENOMEM;
+
 	rt298->index_cache_size = INDEX_CACHE_SIZE;
 	rt298->i2c = i2c;
 	i2c_set_clientdata(i2c, rt298);
-- 
2.1.4