Files
linux/sound/usb
Ard van Breemen 6610b57ed8 ALSA: usb-audio: Skip bSynchAddress endpoint check if it is invalid
[ Upstream commit 1b34121d9f ]

The Linux kernel assumes that get_endpoint(alts,0) and
get_endpoint(alts,1) are eachothers feedback endpoints.
To reassure that validity it will test bsynchaddress to comply with that
assumption. But if the bsyncaddress is 0 (invalid), it will flag that as
a wrong assumption and return an error.
Fix: Skip the test if bSynchAddress is 0.
Note: those with a valid bSynchAddress should have a code quirck added.

Signed-off-by: Ard van Breemen <ard@kwaak.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-10-05 12:47:48 +02:00
..
2017-05-15 11:02:14 +02:00