linux-kernel - [PATCH 06/15] ASoC: wm8994: Update locking around use of DAPM pin API

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Message-Id: <1392655903-24537-7-git-send-email-ckeepax@opensource.wolfsonmicro.com>
Date:	Mon, 17 Feb 2014 16:51:34 +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 06/15] ASoC: wm8994: 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/wm8994.c |   40 ++++++++++++++++++++++++----------------
 1 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index b9be9cb..4788c4e 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -2552,38 +2552,46 @@ int wm8994_vmid_mode(struct snd_soc_codec *codec, enum wm8994_vmid_mode mode)
 
 	switch (mode) {
 	case WM8994_VMID_NORMAL:
+		mutex_lock(&codec->dapm.card->dapm_mutex);
+
 		if (wm8994->hubs.lineout1_se) {
-			snd_soc_dapm_disable_pin(&codec->dapm,
-						 "LINEOUT1N Driver");
-			snd_soc_dapm_disable_pin(&codec->dapm,
-						 "LINEOUT1P Driver");
+			snd_soc_dapm_disable_pin_locked(&codec->dapm,
+							"LINEOUT1N Driver");
+			snd_soc_dapm_disable_pin_locked(&codec->dapm,
+							"LINEOUT1P Driver");
 		}
 		if (wm8994->hubs.lineout2_se) {
-			snd_soc_dapm_disable_pin(&codec->dapm,
-						 "LINEOUT2N Driver");
-			snd_soc_dapm_disable_pin(&codec->dapm,
-						 "LINEOUT2P Driver");
+			snd_soc_dapm_disable_pin_locked(&codec->dapm,
+							"LINEOUT2N Driver");
+			snd_soc_dapm_disable_pin_locked(&codec->dapm,
+							"LINEOUT2P Driver");
 		}
 
+		mutex_unlock(&codec->dapm.card->dapm_mutex);
+
 		/* Do the sync with the old mode to allow it to clean up */
 		snd_soc_dapm_sync(&codec->dapm);
 		wm8994->vmid_mode = mode;
 		break;
 
 	case WM8994_VMID_FORCE:
+		mutex_lock(&codec->dapm.card->dapm_mutex);
+
 		if (wm8994->hubs.lineout1_se) {
-			snd_soc_dapm_force_enable_pin(&codec->dapm,
-						      "LINEOUT1N Driver");
-			snd_soc_dapm_force_enable_pin(&codec->dapm,
-						      "LINEOUT1P Driver");
+			snd_soc_dapm_force_enable_pin_locked(&codec->dapm,
+							     "LINEOUT1N Driver");
+			snd_soc_dapm_force_enable_pin_locked(&codec->dapm,
+							     "LINEOUT1P Driver");
 		}
 		if (wm8994->hubs.lineout2_se) {
-			snd_soc_dapm_force_enable_pin(&codec->dapm,
-						      "LINEOUT2N Driver");
-			snd_soc_dapm_force_enable_pin(&codec->dapm,
-						      "LINEOUT2P Driver");
+			snd_soc_dapm_force_enable_pin_locked(&codec->dapm,
+							     "LINEOUT2N Driver");
+			snd_soc_dapm_force_enable_pin_locked(&codec->dapm,
+							     "LINEOUT2P Driver");
 		}
 
+		mutex_unlock(&codec->dapm.card->dapm_mutex);
+
 		wm8994->vmid_mode = mode;
 		snd_soc_dapm_sync(&codec->dapm);
 		break;
-- 
1.7.2.5

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