Users of devices affected by the Tenor feedback data error report buffer underruns, even with the +/- 0x1.0000 quirk applied. Compensating the error with 0xf000 instead seems to reliably fix that issue.
See
https://sourceforge.net/p/alsa/mailman/message/35230259/
Reported-and-tested-by: Norman Nolte norman.nolte@gmx.net Reported-and-tested-by: Thomas Gresens T.Gresens@intershop.de Signed-off-by: Daniel Mack daniel@zonque.org --- sound/usb/endpoint.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index c317a8d..c470251 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -1174,9 +1174,9 @@ void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep, * by +/- 0x1.0000. */ if (f < ep->freqn - 0x8000) - f += 0x10000; + f += 0xf000; else if (f > ep->freqn + 0x8000) - f -= 0x10000; + f -= 0xf000; } else if (unlikely(ep->freqshift == INT_MIN)) { /* * The first time we see a feedback value, determine its format