linux-kernel - [PATCH] ASoC: soc-core: Prevent warning if no DMI table is present

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Date:   Tue, 2 Mar 2021 09:27:12 +0000
From:   Jon Hunter <jonathanh@...dia.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, Jon Hunter <jonathanh@...dia.com>
Subject: [PATCH] ASoC: soc-core: Prevent warning if no DMI table is present

Many systems do not provide a DMI table and on these systems a warning,
such as the following, is printed on boot ...

 WARNING KERN tegra-audio-graph-card sound: ASoC: no DMI vendor name!

If DMI support is enabled in the kernel, there is no simple way to
detect if a DMI table is table or not. Note that the variable
'dmi_available' is not exported and so cannot be used by kernel modules.
It could be possible to have every ASoC sound card driver set the long
name to avoid the above message, but it might be intentional for the
long name, that we fall back to using the sound card name. Therefore,
make this a debug print by default to avoid the warning.

Signed-off-by: Jon Hunter <jonathanh@...dia.com>
---
 sound/soc/soc-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index f6d4e99b590c..f1189e7c1fcc 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1576,7 +1576,7 @@ int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
 	/* make up dmi long name as: vendor-product-version-board */
 	vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
 	if (!vendor || !is_dmi_valid(vendor)) {
-		dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
+		dev_dbg(card->dev, "ASoC: no DMI vendor name!\n");
 		return 0;
 	}

-- 
2.25.1