ASoC: wm5100: Update locking around use of DAPM pin API

The pin updates in this driver look like they are intended to be done
atomically, update to do so.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 9 insertions, 3 deletions

diff --git a/sound/soc/codecs/wm5100.c b/sound/soc/codecs/wm5100.c
index 4e3e31aaf509..492fe846ae68 100644
--- a/sound/soc/codecs/wm5100.c
+++ b/sound/soc/codecs/wm5100.c
@@ -2100,6 +2100,7 @@ static void wm5100_micd_irq(struct wm5100_priv *wm5100)
 int wm5100_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack)
 {
         struct wm5100_priv *wm5100 = snd_soc_codec_get_drvdata(codec);
+        struct snd_soc_dapm_context *dapm = &codec->dapm;
 
         if (jack) {
                 wm5100->jack = jack;
@@ -2117,9 +2118,14 @@ int wm5100_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack)
                                     WM5100_ACCDET_RATE_MASK);
 
                 /* We need the charge pump to power MICBIAS */
-                snd_soc_dapm_force_enable_pin(&codec->dapm, "CP2");
-                snd_soc_dapm_force_enable_pin(&codec->dapm, "SYSCLK");
-                snd_soc_dapm_sync(&codec->dapm);
+                snd_soc_dapm_mutex_lock(dapm);
+
+                snd_soc_dapm_force_enable_pin_unlocked(dapm, "CP2");
+                snd_soc_dapm_force_enable_pin_unlocked(dapm, "SYSCLK");
+
+                snd_soc_dapm_sync_unlocked(dapm);
+
+                snd_soc_dapm_mutex_unlock(dapm);
 
                 /* We start off just enabling microphone detection - even a
                  * plain headphone will trigger detection.