[RFC PATCH 1/2] ASoC: core: Print one-time messages if missing resources when binding DAIs

From: Javier Martinez Canillas
Date: Wed Oct 19 2016 - 13:21:27 EST


If snd_soc_find_dai() doesn't find a DAI in soc_bind_dai_link(), a
error message is printed and an -EPROBE_DEFER errno code returned to
the caller.

But since many probe retries can happen before a resource is available,
the printed messages can spam the kernel log buffer and slow the boot.

The information is useful to know that a dependency was not meet and a
defer happened, but isn't necessary to print it on each probe deferral.

Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
---

sound/soc/soc-core.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index c0bbcd903261..4679c07e0ff6 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1013,8 +1013,8 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
cpu_dai_component.dai_name = dai_link->cpu_dai_name;
rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
if (!rtd->cpu_dai) {
- dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
- dai_link->cpu_dai_name);
+ dev_err_once(card->dev, "ASoC: CPU DAI %s not registered\n",
+ dai_link->cpu_dai_name);
goto _err_defer;
}

@@ -1025,8 +1025,9 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
for (i = 0; i < rtd->num_codecs; i++) {
codec_dais[i] = snd_soc_find_dai(&codecs[i]);
if (!codec_dais[i]) {
- dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
- codecs[i].dai_name);
+ dev_err_once(card->dev,
+ "ASoC: CODEC DAI %s not registered\n",
+ codecs[i].dai_name);
goto _err_defer;
}
}
@@ -1054,8 +1055,8 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
rtd->platform = platform;
}
if (!rtd->platform) {
- dev_err(card->dev, "ASoC: platform %s not registered\n",
- dai_link->platform_name);
+ dev_err_once(card->dev, "ASoC: platform %s not registered\n",
+ dai_link->platform_name);
goto _err_defer;
}

--
2.7.4