[alsa-devel] [PATCH v2 7/7] ASoC: soc-pcm: tidyup soc_pcm_open() order

[Kuninori Morimoto]

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

soc_pcm_open() operation order is not good.
At first, soc_pcm_open() operation order is

	1) CPU DAI startup
	2) Component open
	3) Codec DAI startup
	4) rtd startup

But here, 2) will call try_module_get() if component has
module_get_upon_open flags. This means 1) CPU DAI startup
will be operated *before* its module was loaded.
DAI should be called *after* Component.

Second, soc_pcm_close() operation order is
	1) CPU DAI shutdown
	2) Codec DAI shutdown
	3) rtd shutdown
	4) Component close

soc_pcm_open() and soc_pcm_close() are paired function,
but, its operation order is unbalance.
This patch tidyup soc_pcm_open() order to Component -> rtd -> DAI.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
v1 -> v2

	- no change

 sound/soc/soc-pcm.c | 36 +++++++++++++++++-------------------
 1 file changed, 17 insertions(+), 19 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 00b6cb9..f57b445 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -571,18 +571,25 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 
 	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 
+	ret = soc_pcm_components_open(substream);
+	if (ret < 0)
+		goto component_err;
+
+	ret = soc_rtd_startup(rtd, substream);
+	if (ret < 0) {
+		pr_err("ASoC: %s startup failed: %d\n",
+		       rtd->dai_link->name, ret);
+		goto rtd_err;
+	}
+
 	/* startup the audio subsystem */
 	ret = snd_soc_dai_startup(cpu_dai, substream);
 	if (ret < 0) {
 		dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
 			cpu_dai->name, ret);
-		goto out;
+		goto cpu_dai_err;
 	}
 
-	ret = soc_pcm_components_open(substream);
-	if (ret < 0)
-		goto component_err;
-
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
 		int r = snd_soc_dai_startup(codec_dai, substream);
 
@@ -598,14 +605,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 			codec_dai->rx_mask = 0;
 	}
 	if (ret < 0)
-		goto codec_dai_err;
-
-	ret = soc_rtd_startup(rtd, substream);
-	if (ret < 0) {
-		pr_err("ASoC: %s startup failed: %d\n",
-		       rtd->dai_link->name, ret);
-		goto codec_dai_err;
-	}
+		goto config_err;
 
 	/* Dynamic PCM DAI links compat checks use dynamic capabilities */
 	if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
@@ -671,17 +671,15 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	return 0;
 
 config_err:
-	soc_rtd_shutdown(rtd, substream);
-
-codec_dai_err:
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		snd_soc_dai_shutdown(codec_dai, substream);
-
+cpu_dai_err:
+	snd_soc_dai_shutdown(cpu_dai, substream);
+rtd_err:
+	soc_rtd_shutdown(rtd, substream);
 component_err:
 	soc_pcm_components_close(substream);
 
-	snd_soc_dai_shutdown(cpu_dai, substream);
-out:
 	mutex_unlock(&rtd->card->pcm_mutex);
 
 	for_each_rtd_components(rtd, i, component) {
-- 
2.7.4