[PATCH 5.16 0833/1017] ASoC: soc-core: skip zero num_dai component in searching dai name

From: Greg Kroah-Hartman
Date: Tue Apr 05 2022 - 09:23:53 EST

From: Shengjiu Wang <shengjiu.wang@xxxxxxx>

[ Upstream commit f7d344a2bd5ec81fbd1ce76928fd059e57ec9bea ]

In the case like dmaengine which's not a dai but as a component, the
num_dai is zero, dmaengine component has the same component_of_node
as cpu dai, when cpu dai component is not ready, but dmaengine component
is ready, try to get cpu dai name, the snd_soc_get_dai_name() return
-EINVAL, not -EPROBE_DEFER, that cause below error:

asoc-simple-card <card name>: parse error -22
asoc-simple-card: probe of <card name> failed with error -22

The sound card failed to probe.

So this patch fixes the issue above by skipping the zero num_dai
component in searching dai name.

Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
Link: https://lore.kernel.org/r/1644491952-7457-1-git-send-email-shengjiu.wang@xxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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 dcf6be4c4aaa..0dc89f568407 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3184,7 +3184,7 @@ int snd_soc_get_dai_name(const struct of_phandle_args *args,
for_each_component(pos) {
struct device_node *component_of_node = soc_component_to_node(pos);

- if (component_of_node != args->np)
+ if (component_of_node != args->np || !pos->num_dai)

ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);