ALSA: usb-audio: Release components on probe errors

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usb_audio_probe() can create USB-audio component resources before the
first interface is recorded in chip->num_interfaces.  If a later probe
step fails, the error path drops chip->active and frees the card directly
when no interfaces have been registered.

Normal disconnect first releases USB-audio components in a fixed order
before the card is freed.  The first-interface probe error path skipped
that sequence, so partially initialized PCM, endpoint, MIDI, media, or
mixer resources could be left for the card private_free path without their
disconnect handling having run.

Move the existing normal-disconnect component release sequence into a
helper and call it from the zero-interface probe error path before
snd_card_free().  Keep the normal disconnect ordering unchanged: PCM
streams, endpoint resources, MIDI 1.0 resources, MIDI 2.0 resources, media
device cleanup, then mixer resources.

Assisted-by: Codex:gpt-5.5
Signed-off-by: Cen Zhang <zzzccc427@gmail.com>
Link: https://patch.msgid.link/20260618170026.192212-1-zzzccc427@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Cen Zhang 2026-06-19 01:00:26 +08:00 • committed by Takashi Iwai

parent e096c24e7f

commit 3213bf9885

1 changed files with 38 additions and 32 deletions

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sound/usb/card.c

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