The info message that was added in the commit a4aad5636c72 ("ALSA:
usb-audio: Inform devices that need delayed registration") is actually
useful to know the need for the delayed registration. However, it
turned out that this doesn't catch the all cases; namely, this warned
only when a PCM stream is attached onto the existing PCM instance, but
it doesn't count for a newly created PCM instance. This made
confusion as if there were no further delayed registration.
This patch moves the check to the code path for either adding a stream
or creating a PCM instance. Also, make it simpler by checking the
card->registered flag instead of querying each snd_device state.
Fixes: a4aad5636c72 ("ALSA: usb-audio: Inform devices that need delayed registration")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216082
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
sound/usb/stream.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index ceb93d798182..40b7821c6c99 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -495,6 +495,10 @@ static int __snd_usb_add_audio_stream(struct snd_usb_audio *chip,
return 0;
}
}
+
+ if (chip->card->registered)
+ chip->need_delayed_register = true;
+
/* look for an empty stream */
list_for_each_entry(as, &chip->pcm_list, list) {
if (as->fmt_type != fp->fmt_type)
@@ -502,9 +506,6 @@ static int __snd_usb_add_audio_stream(struct snd_usb_audio *chip,
subs = &as->substream[stream];
if (subs->ep_num)
continue;
- if (snd_device_get_state(chip->card, as->pcm) !=
- SNDRV_DEV_BUILD)
- chip->need_delayed_register = true;
err = snd_pcm_new_stream(as->pcm, stream, 1);
if (err < 0)
return err;
--
2.35.3
