ALSA: usb-audio: Skip bSynchAddress endpoint check if it is invalid

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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>

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Ard van Breemen 2019-08-02 13:52:14 +02:00 • committed by Takashi Iwai

parent f7f5301814

commit 1b34121d9f

1 changed files with 1 additions and 0 deletions

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sound/usb/pcm.c

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