ASoC: tlv320dac33: Avoid powering off while in BIAS_OFF

Avoid calling the dac33_hard_power when the codec was
already in BIAS_OFF state.
This could happen in device suspend and module removal
time.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index ad1795a83acb..bcf6d934499a 100644
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -589,6 +589,9 @@ static int dac33_set_bias_level(struct snd_soc_codec *codec,
                 }
                 break;
         case SND_SOC_BIAS_OFF:
+                /* Do not power off, when the codec is already off */
+                if (codec->bias_level == SND_SOC_BIAS_OFF)
+                        return 0;
                 ret = dac33_hard_power(codec, 0);
                 if (ret != 0)
                         return ret;