ASoC: soc-core: Fix null pointer dereference
In case the codec driver did not provide a read/write function,
codec->driver->read|write will be NULL. Ensure that we use the one
specified in codec->read|write to avoid oopsing when we access
the debugfs entries. This is achieved by using snd_soc_read() and
snd_soc_write().
Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.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 b4c8c38..a14a050 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -117,7 +117,7 @@
* the register being volatile and the device being
* powered off.
*/
- ret = codec->driver->read(codec, i);
+ ret = snd_soc_read(codec, i);
if (ret >= 0)
count += snprintf(buf + count,
PAGE_SIZE - count,
@@ -228,7 +228,7 @@
start++;
if (strict_strtoul(start, 16, &value))
return -EINVAL;
- codec->driver->write(codec, reg, value);
+ snd_soc_write(codec, reg, value);
return buf_size;
}
