[PATCH 4/4] ASoC: soc-core: Add dynamic debug logs in soc_dai_link_sanity_check()

[Pierre-Louis Bossart]

From: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>

When a platform device is created successfully but the machine driver
probe fails due to errors with missing components during the card bind
stage, no error is propagated or logged. To help flag such problems,
add a dynamic debug log.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski at linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta at gmail.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 sound/soc/soc-core.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 843b8b1c89d4..8b2f6dd2fc8e 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -865,8 +865,12 @@ static int soc_dai_link_sanity_check(struct snd_soc_card *card,
 		 * Defer card registration if codec component is not added to
 		 * component list.
 		 */
-		if (!soc_find_component(codec))
+		if (!soc_find_component(codec)) {
+			dev_dbg(card->dev,
+				"ASoC: codec component %s not found for link %s\n",
+				codec->name, link->name);
 			return -EPROBE_DEFER;
+		}
 	}
 
 	for_each_link_platforms(link, i, platform) {
@@ -886,8 +890,12 @@ static int soc_dai_link_sanity_check(struct snd_soc_card *card,
 		 * Defer card registration if platform component is not added to
 		 * component list.
 		 */
-		if (!soc_find_component(platform))
+		if (!soc_find_component(platform)) {
+			dev_dbg(card->dev,
+				"ASoC: platform component %s not found for link %s\n",
+				platform->name, link->name);
 			return -EPROBE_DEFER;
+		}
 	}
 
 	for_each_link_cpus(link, i, cpu) {
@@ -908,8 +916,12 @@ static int soc_dai_link_sanity_check(struct snd_soc_card *card,
 		 * component list.
 		 */
 		if ((cpu->of_node || cpu->name) &&
-		    !soc_find_component(cpu))
+		    !soc_find_component(cpu)) {
+			dev_dbg(card->dev,
+				"ASoC: cpu component %s not found for link %s\n",
+				cpu->name, link->name);
 			return -EPROBE_DEFER;
+		}
 
 		/*
 		 * At least one of CPU DAI name or CPU device name/node must be
-- 
2.20.1