linux-kernel - [PATCH] ASoC: fix card registration regression.

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Message-Id: <20200219102526.692126-1-jbrunet@baylibre.com>
Date:   Wed, 19 Feb 2020 11:25:26 +0100
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>
Cc:     Jerome Brunet <jbrunet@...libre.com>, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rpi-kernel <linux-rpi-kernel@...ts.infradead.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: [PATCH] ASoC: fix card registration regression.

This reverts commit b2354e4009a773c00054b964d937e1b81cb92078.

This change might have been desirable to ensure the uniqueness of
the component name. It would have helped to better support linux
devices which register multiple components, something is which more
common than initially thought.

However, some card driver are directly using dev_name() to fill the
component names of the dai_link which is a problem if want to change
the way ASoC generates the component names.

Until we figure out the appropriate way to deal with this, revert the
change and keep the names as they were. There might be a couple of warning
related to debugfs (which were already present before the change) but it
is still better than breaking working audio cards.

Cc: Marek Szyprowski <m.szyprowski@...sung.com>
Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 sound/soc/soc-core.c | 29 +----------------------------
 1 file changed, 1 insertion(+), 28 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 30c17fde14ca..518b652cf872 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2442,33 +2442,6 @@ static int snd_soc_register_dais(struct snd_soc_component *component,
 	return ret;
 }
 
-static char *snd_soc_component_unique_name(struct device *dev,
-					   struct snd_soc_component *component)
-{
-	struct snd_soc_component *pos;
-	int count = 0;
-	char *name, *unique;
-
-	name = fmt_single_name(dev, &component->id);
-	if (!name)
-		return name;
-
-	/* Count the number of components registred by the device */
-	for_each_component(pos) {
-		if (dev == pos->dev)
-			count++;
-	}
-
-	/* Keep naming as it is for the 1st component */
-	if (!count)
-		return name;
-
-	unique = devm_kasprintf(dev, GFP_KERNEL, "%s-%d", name, count);
-	devm_kfree(dev, name);
-
-	return unique;
-}
-
 static int snd_soc_component_initialize(struct snd_soc_component *component,
 	const struct snd_soc_component_driver *driver, struct device *dev)
 {
@@ -2477,7 +2450,7 @@ static int snd_soc_component_initialize(struct snd_soc_component *component,
 	INIT_LIST_HEAD(&component->card_list);
 	mutex_init(&component->io_mutex);
 
-	component->name = snd_soc_component_unique_name(dev, component);
+	component->name = fmt_single_name(dev, &component->id);
 	if (!component->name) {
 		dev_err(dev, "ASoC: Failed to allocate name\n");
 		return -ENOMEM;
-- 
2.24.1