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SubjectApplied "ASoC: core: ensure component names are unique" to the asoc tree
The patch

ASoC: core: ensure component names are unique

has been applied to the asoc tree at

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
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From b2354e4009a773c00054b964d937e1b81cb92078 Mon Sep 17 00:00:00 2001
From: Jerome Brunet <>
Date: Fri, 14 Feb 2020 14:47:04 +0100
Subject: [PATCH] ASoC: core: ensure component names are unique

Make sure each ASoC component is registered with a unique name.
The component is derived from the device name. If a device registers more
than one component, the component names will be the same.

This usually brings up a warning about the debugfs directory creation of
the component since directory already exists.

In such case, start numbering the component of the device so the names
don't collide anymore.

Signed-off-by: Jerome Brunet <>
Signed-off-by: Mark Brown <>
sound/soc/soc-core.c | 29 ++++++++++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 03b87427faa7..6a58a8f6e3c4 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2446,6 +2446,33 @@ 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)
@@ -2454,7 +2481,7 @@ static int snd_soc_component_initialize(struct snd_soc_component *component,

- component->name = fmt_single_name(dev, &component->id);
+ component->name = snd_soc_component_unique_name(dev, component);
if (!component->name) {
dev_err(dev, "ASoC: Failed to allocate name\n");
return -ENOMEM;
 \ /
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