tree 09e6fd2e2f1d81e54e52789ad1baf3eee2992b81
parent 8e5ced83dd1c3090c96c4e0614703f0f2a5ba2f4
author Clemens Ladisch <clemens@ladisch.de> 1365104637 +0200
committer Clemens Ladisch <clemens@ladisch.de> 1372363189 +0200

ALSA: usb-audio: claim autodetected PCM interfaces all at once

snd_card_register() registers all devices newly added since the last
call.  However, the playback/capture streams are handled as one ALSA
device, so the second /dev device will not be registered if the PCM
streams are added in two steps.

QUIRK_AUTODETECT caused the probe callback to be called once for each
interface, which triggered this problem.  Work around this by handling
this like the composite quirk, i.e., autodetecting all other interfaces
that might be used for PCM or MIDI.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>