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| author | Takashi Iwai <tiwai@suse.de> | 2022-06-06 18:09:09 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2022-06-06 18:11:09 +0200 |
| commit | efb75df105e82f076a85b9f2d81410428bcb55fc (patch) | |
| tree | efd0327c76ef57ad9cc9dfbb572fb1c4643f01c4 /sound | |
| parent | 85743a847caeab696dafc4ce1a7e1e2b7e29a0f6 (diff) | |
| download | linux-efb75df105e82f076a85b9f2d81410428bcb55fc.tar.bz2 | |
ALSA: usb-audio: Skip generic sync EP parse for secondary EP
When ep_idx is already non-zero, it means usually a capture stream
that is set up explicity by a fixed-format quirk, and applying the
check for generic (non-implicit-fb) sync EPs might hit incorrectly,
resulting in a bogus sync endpoint for the capture stream.
This patch adds a check for the ep_idx and skip if it's a secondary
endpoint. It's a part of the fixes for regressions on Saffire 6.
Fixes: 7b0efea4baf0 ("ALSA: usb-audio: Add missing ep_idx in fixed EP quirks")
Reported-and-tested-by: André Kapelrud <a.kapelrud@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220606160910.6926-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/usb/pcm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index b470404a5376..b0369df53910 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -304,7 +304,7 @@ int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip, * Generic sync EP handling */ - if (altsd->bNumEndpoints < 2) + if (fmt->ep_idx > 0 || altsd->bNumEndpoints < 2) return 0; is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN); |