Commit e4f078d8 authored by Dimitris Papastamos's avatar Dimitris Papastamos Committed by Mark Brown

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: default avatarDimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 5a4cfce7
......@@ -117,7 +117,7 @@ static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
* 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 @@ static ssize_t codec_reg_write_file(struct file *file,
start++;
if (strict_strtoul(start, 16, &value))
return -EINVAL;
codec->driver->write(codec, reg, value);
snd_soc_write(codec, reg, value);
return buf_size;
}
......
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