ASoC: Make soc_dpcm_debugfs_add() non-fatal

Failing to register the debugfs entries is not fatal and will not affect
normal operation of the sound card. Don't abort the card registration if
soc_dpcm_debugfs_add() fails.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-dpcm.h

@@ -135,7 +135,7 @@ void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, int stream,
 
 /* internal use only */
 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute);
-int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
+void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
 int soc_dpcm_runtime_update(struct snd_soc_card *);
 
 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,

sound/soc/soc-core.c

@@ -1328,15 +1328,8 @@ static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
 
 #ifdef CONFIG_DEBUG_FS
 	/* add DPCM sysfs entries */
-	if (dai_link->dynamic) {
-		ret = soc_dpcm_debugfs_add(rtd);
-		if (ret < 0) {
-			dev_err(rtd->dev,
-				"ASoC: failed to add dpcm sysfs entries: %d\n",
-				ret);
-			return ret;
-		}
-	}
+	if (dai_link->dynamic)
+		soc_dpcm_debugfs_add(rtd);
 #endif
 
 	if (cpu_dai->driver->compress_dai) {

sound/soc/soc-pcm.c

@@ -2802,10 +2802,10 @@ static const struct file_operations dpcm_state_fops = {
 	.llseek = default_llseek,
 };
 
-int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
+void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
 {
 	if (!rtd->dai_link)
-		return 0;
+		return;
 
 	rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
 			rtd->card->debugfs_card_root);
@@ -2813,13 +2813,11 @@ int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
 		dev_dbg(rtd->dev,
 			 "ASoC: Failed to create dpcm debugfs directory %s\n",
 			 rtd->dai_link->name);
-		return -EINVAL;
+		return;
 	}
 
 	rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
 						rtd->debugfs_dpcm_root,
 						rtd, &dpcm_state_fops);
-
-	return 0;
 }
 #endif