ASoC: soc-dapm.c: cleanup snd_soc_dapm_new_dai()

snd_soc_dapm_new_dai() setups local variable "template" at (X) and (Y),
which is used at (Z). But these are difficult to read.

	static struct snd_soc_dapm_widget * snd_soc_dapm_new_dai()
	{
		...

 ^		template.reg = ...
 |		template.id = ...
(X)		template.name = ...
 |		template.event = ...
 |		template.event_flags = ...
 v		template.kcontrol_news = ...

		if (rtd->dai_link->num_params > 1) {
			...
 ^			template.num_kcontrols = ...
(Y)			template.kcontrol_news = ...
 v			...
		}

		...
(Z)		w = snd_soc_dapm_new_control_unlocked(..., &template);

	}

And this function has error message, but not for all cases.
This patch (1) setups "template" in one place, and indicate error message
for all cases. This patch cleanup the code, but nothing changed for
meaning.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/871qr4tzro.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 7a170e1..ddaa079 100644 (file)
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -4131,56 +4131,53 @@ snd_soc_dapm_new_dai(struct snd_soc_card *card,
        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
        struct snd_soc_dapm_widget template;
        struct snd_soc_dapm_widget *w;
+       const struct snd_kcontrol_new *kcontrol_news;
+       int num_kcontrols;
        const char **w_param_text;
        unsigned long private_value = 0;
        char *link_name;
-       int ret;
+       int ret = -ENOMEM;
 
        link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
                                   rtd->dai_link->name, id);
        if (!link_name)
-               return ERR_PTR(-ENOMEM);
-
-       memset(&template, 0, sizeof(template));
-       template.reg = SND_SOC_NOPM;
-       template.id = snd_soc_dapm_dai_link;
-       template.name = link_name;
-       template.event = snd_soc_dai_link_event;
-       template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
-               SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD;
-       template.kcontrol_news = NULL;
+               goto name_fail;
 
        /* allocate memory for control, only in case of multiple configs */
+       w_param_text    = NULL;
+       kcontrol_news   = NULL;
+       num_kcontrols   = 0;
        if (rtd->dai_link->num_params > 1) {
                w_param_text = devm_kcalloc(card->dev,
                                            rtd->dai_link->num_params,
                                            sizeof(char *), GFP_KERNEL);
-               if (!w_param_text) {
-                       ret = -ENOMEM;
+               if (!w_param_text)
                        goto param_fail;
-               }
 
-               template.num_kcontrols = 1;
-               template.kcontrol_news =
-                                       snd_soc_dapm_alloc_kcontrol(card,
-                                               link_name,
-                                               rtd->dai_link->params,
-                                               rtd->dai_link->num_params,
-                                               w_param_text, &private_value);
-               if (!template.kcontrol_news) {
-                       ret = -ENOMEM;
+               num_kcontrols = 1;
+               kcontrol_news = snd_soc_dapm_alloc_kcontrol(card, link_name,
+                                                           rtd->dai_link->params,
+                                                           rtd->dai_link->num_params,
+                                                           w_param_text, &private_value);
+               if (!kcontrol_news)
                        goto param_fail;
-               }
-       } else {
-               w_param_text = NULL;
        }
+
+       memset(&template, 0, sizeof(template));
+       template.reg            = SND_SOC_NOPM;
+       template.id             = snd_soc_dapm_dai_link;
+       template.name           = link_name;
+       template.event          = snd_soc_dai_link_event;
+       template.event_flags    = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
+                                 SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD;
+       template.kcontrol_news  = kcontrol_news;
+       template.num_kcontrols  = num_kcontrols;
+
        dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
 
        w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
        if (IS_ERR(w)) {
                ret = PTR_ERR(w);
-               dev_err(rtd->dev, "ASoC: Failed to create %s widget: %d\n",
-                       link_name, ret);
                goto outfree_kcontrol_news;
        }
 
@@ -4194,6 +4191,9 @@ outfree_kcontrol_news:
                                   rtd->dai_link->num_params, w_param_text);
 param_fail:
        devm_kfree(card->dev, link_name);
+name_fail:
+       dev_err(rtd->dev, "ASoC: Failed to create %s-%s widget: %d\n",
+               rtd->dai_link->name, id, ret);
        return ERR_PTR(ret);
 }