ASoC: soc-core: Add support for NULL default register caches
The infrastructure for handling NULL default register maps is already
included in the soc-cache code, just ensure that we don't try to dereference
a NULL pointer while accessing a NULL register cache.
Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Timur Tabi <timur@freescale.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 96bf381..4274435 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3507,11 +3507,13 @@
* kernel might have freed the array by the time we initialize
* the cache.
*/
- codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
- reg_size, GFP_KERNEL);
- if (!codec->reg_def_copy) {
- ret = -ENOMEM;
- goto fail;
+ 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;
+ }
}
}