ALSA: usb: Only get AudioControl header for UAC1 class.
authorJorge Sanjuan <jorge.sanjuan@codethink.co.uk>
Fri, 4 May 2018 01:24:01 +0000 (04:24 +0300)
committerTakashi Iwai <tiwai@suse.de>
Fri, 4 May 2018 07:39:27 +0000 (09:39 +0200)
commit3763f6186703d9939913996da1c71d8f8ddb035c
tree7e5db70953debbda4600a94da29dfc971d426b69
parenteda553f43217ac873a771fd2bd538dfe5faae5e6
ALSA: usb: Only get AudioControl header for UAC1 class.

The control header needs to be read from buffer at this point only
in the case of UAC1 protocol. Move it inside the switch case as other
protocols such as the Basic Audio Device spec will have an empty buffer
that is latter filled as inferred.

Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
[Ruslan: updated with recently added sanity checks]
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/usb/card.c