diff options
| -rw-r--r-- | sound/soc/soc-core.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index d56bbea6e..a862361f7 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -2103,9 +2103,13 @@ unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg) { unsigned int ret; - ret = codec->read(codec, reg); - dev_dbg(codec->dev, "read %x => %x\n", reg, ret); - trace_snd_soc_reg_read(codec, reg, ret); + if (codec->read) { + ret = codec->read(codec, reg); + dev_dbg(codec->dev, "read %x => %x\n", reg, ret); + trace_snd_soc_reg_read(codec, reg, ret); + } + else + ret = -EIO; return ret; } @@ -2114,9 +2118,13 @@ EXPORT_SYMBOL_GPL(snd_soc_read); unsigned int snd_soc_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int val) { - dev_dbg(codec->dev, "write %x = %x\n", reg, val); - trace_snd_soc_reg_write(codec, reg, val); - return codec->write(codec, reg, val); + if (codec->write) { + dev_dbg(codec->dev, "write %x = %x\n", reg, val); + trace_snd_soc_reg_write(codec, reg, val); + return codec->write(codec, reg, val); + } + else + return -EIO; } EXPORT_SYMBOL_GPL(snd_soc_write); |