ASoC: Ensure we only run Speyside WM8962 bias level callbacks once

We get called once per DAPM context but only need to run once. When DAPM
was serialized this was a series of noops but now it can run in parallel
we need to take proper care.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/sound/soc/samsung/speyside_wm8962.c b/sound/soc/samsung/speyside_wm8962.c
index 0b9eb5f7ec4c..72535f2daaf2 100644
--- a/sound/soc/samsung/speyside_wm8962.c
+++ b/sound/soc/samsung/speyside_wm8962.c
@@ -23,6 +23,9 @@ static int speyside_wm8962_set_bias_level(struct snd_soc_card *card,
         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
         int ret;
 
+        if (dapm->dev != codec_dai->dev)
+                return 0;
+
         switch (level) {
         case SND_SOC_BIAS_PREPARE:
                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
@@ -57,6 +60,9 @@ static int speyside_wm8962_set_bias_level_post(struct snd_soc_card *card,
         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
         int ret;
 
+        if (dapm->dev != codec_dai->dev)
+                return 0;
+
         switch (level) {
         case SND_SOC_BIAS_STANDBY:
                 ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,