[alsa-devel] [PATCH 2/5] ASoC: rsnd: make sure it uses lock when it calls rsnd_dai_call

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

rsnd_dai_call() should be called under rsnd_lock

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 sound/soc/sh/rcar/core.c | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index a2a0b57..164653c 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -731,10 +731,15 @@ static int rsnd_hw_params(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
+	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
+	unsigned long flags;
 	int ret;
 
+	rsnd_lock(priv, flags);
 	ret = rsnd_dai_call(hw_params, io, substream, hw_params);
+	rsnd_unlock(priv, flags);
+
 	if (ret)
 		return ret;
 
@@ -919,14 +924,16 @@ int rsnd_kctrl_new_e(struct rsnd_mod *mod,
 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_dai *dai = rtd->cpu_dai;
+	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
-	int ret;
+	unsigned long flags;
+	int ret = 0;
 
-	ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
-	if (ret)
-		return ret;
+	rsnd_lock(priv, flags);
+	ret |= rsnd_dai_call(pcm_new, &rdai->playback, rtd);
+	ret |= rsnd_dai_call(pcm_new, &rdai->capture, rtd);
+	rsnd_unlock(priv, flags);
 
-	ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
 	if (ret)
 		return ret;
 
@@ -949,8 +956,11 @@ static const struct snd_soc_component_driver rsnd_soc_component = {
 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
 				       struct rsnd_dai_stream *io)
 {
+	unsigned long flags;
 	int ret;
 
+	rsnd_lock(priv, flags);
+
 	ret = rsnd_dai_call(probe, io, priv);
 	if (ret == -EAGAIN) {
 		/*
@@ -983,6 +993,7 @@ static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
 		 */
 		ret = rsnd_dai_call(probe, io, priv);
 	}
+	rsnd_unlock(priv, flags);
 
 	return ret;
 }
@@ -998,6 +1009,7 @@ static int rsnd_probe(struct platform_device *pdev)
 	struct rsnd_dai *rdai;
 	const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
 	const struct rsnd_of_data *of_data;
+	unsigned long flags;
 	int (*probe_func[])(struct platform_device *pdev,
 			    const struct rsnd_of_data *of_data,
 			    struct rsnd_priv *priv) = {
@@ -1084,10 +1096,12 @@ static int rsnd_probe(struct platform_device *pdev)
 exit_snd_soc:
 	snd_soc_unregister_platform(dev);
 exit_snd_probe:
+	rsnd_lock(priv, flags);
 	for_each_rsnd_dai(rdai, priv, i) {
 		rsnd_dai_call(remove, &rdai->playback, priv);
 		rsnd_dai_call(remove, &rdai->capture, priv);
 	}
+	rsnd_unlock(priv, flags);
 
 	return ret;
 }
@@ -1096,6 +1110,7 @@ static int rsnd_remove(struct platform_device *pdev)
 {
 	struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 	struct rsnd_dai *rdai;
+	unsigned long flags;
 	void (*remove_func[])(struct platform_device *pdev,
 			      struct rsnd_priv *priv) = {
 		rsnd_ssi_remove,
@@ -1106,10 +1121,12 @@ static int rsnd_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 
+	rsnd_lock(priv, flags);
 	for_each_rsnd_dai(rdai, priv, i) {
 		ret |= rsnd_dai_call(remove, &rdai->playback, priv);
 		ret |= rsnd_dai_call(remove, &rdai->capture, priv);
 	}
+	rsnd_unlock(priv, flags);
 
 	for (i = 0; i < ARRAY_SIZE(remove_func); i++)
 		remove_func[i](pdev, priv);
-- 
1.9.1