ASoC: soc-core: use devm_kzalloc() for rtd

Current rtd, rtd->dev, rtd->codec_dais are created by normal kzalloc(),
but we want to use devm_kzalloc() as much as possible.

Created rtd->dev is registered by device_register() at
soc_new_pcm_runtime(), and it will be freed at
soc_free_pcm_runtime() by device_unregister().

This means, if we can use devm_kzalloc(rtd->dev, xxx) for
rtd / rtd->codec_dais, all these are automatically freed
via soc_free_pcm_runtime().
This patch uses devm_kzalloc(rtd->dev, xxx) for rtd / rtd->codec_dais.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/877e5nbu1z.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-core.c

@@ -370,7 +370,6 @@ static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
 	if (!rtd)
 		return;
 
-	kfree(rtd->codec_dais);
 	list_del(&rtd->list);
 
 	/*
@@ -384,7 +383,6 @@ static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
 	 *	soc_new_pcm_runtime()
 	 */
 	device_unregister(rtd->dev);
-	kfree(rtd);
 }
 
 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
@@ -416,7 +414,7 @@ static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
 	/*
 	 * for rtd
 	 */
-	rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
+	rtd = devm_kzalloc(dev, sizeof(*rtd), GFP_KERNEL);
 	if (!rtd)
 		goto free_rtd;
 
@@ -426,7 +424,7 @@ static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
 	/*
 	 * for rtd->codec_dais
 	 */
-	rtd->codec_dais = kcalloc(dai_link->num_codecs,
+	rtd->codec_dais = devm_kcalloc(dev, dai_link->num_codecs,
 					sizeof(struct snd_soc_dai *),
 					GFP_KERNEL);
 	if (!rtd->codec_dais)