linux-kernel - [PATCH 05/15] ASoC: wm8962: Update locking around use of DAPM pin API

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Message-Id: <1392655903-24537-6-git-send-email-ckeepax@opensource.wolfsonmicro.com>
Date:	Mon, 17 Feb 2014 16:51:33 +0000
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	broonie@...nel.org
Cc:	myungjoo.ham@...sung.com, cw00.choi@...sung.com,
	dmitry.torokhov@...il.com, lgirdwood@...il.com, lars@...afoo.de,
	peter.ujfalusi@...com, jarkko.nikula@...mer.com,
	eric.y.miao@...il.com, haojian.zhuang@...il.com,
	linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com,
	alsa-devel@...a-project.org, linux@....linux.org.uk
Subject: [PATCH 05/15] ASoC: wm8962: 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@...nsource.wolfsonmicro.com>
---
 sound/soc/codecs/wm8962.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index c06bb50..535a7dc 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -3126,14 +3126,18 @@ int wm8962_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack)
 	snd_soc_jack_report(wm8962->jack, 0,
 			    SND_JACK_MICROPHONE | SND_JACK_BTN_0);
 
+	mutex_lock(&codec->dapm.card->dapm_mutex);
+
 	if (jack) {
-		snd_soc_dapm_force_enable_pin(&codec->dapm, "SYSCLK");
-		snd_soc_dapm_force_enable_pin(&codec->dapm, "MICBIAS");
+		snd_soc_dapm_force_enable_pin_locked(&codec->dapm, "SYSCLK");
+		snd_soc_dapm_force_enable_pin_locked(&codec->dapm, "MICBIAS");
 	} else {
-		snd_soc_dapm_disable_pin(&codec->dapm, "SYSCLK");
-		snd_soc_dapm_disable_pin(&codec->dapm, "MICBIAS");
+		snd_soc_dapm_disable_pin_locked(&codec->dapm, "SYSCLK");
+		snd_soc_dapm_disable_pin_locked(&codec->dapm, "MICBIAS");
 	}
 
+	mutex_unlock(&codec->dapm.card->dapm_mutex);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(wm8962_mic_detect);
-- 
1.7.2.5

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