From 17c5f7dd425becd30c4a2dafaecb054641a1fdc9 Mon Sep 17 00:00:00 2001 From: Alexander Tsoy Date: Mon, 29 Jun 2020 05:59:33 +0300 Subject: [PATCH 3/5] ALSA: usb-audio: Fix packet size calculation Commit f0bd62b64016 ("ALSA: usb-audio: Improve frames size computation") introduced a regression for devices which have playback endpoints with bInterval > 1. Fix this by taking ep->datainterval into account. Note that frame and fps are actually mean packet and packets per second in the code introduces by the mentioned commit. This will be fixed in a follow-up patch. Fixes: f0bd62b64016 ("ALSA: usb-audio: Improve frames size computation") BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208353 Signed-off-by: Alexander Tsoy --- sound/usb/endpoint.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 9bea7d3f99f8..11f23778f0a5 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -1093,6 +1093,7 @@ int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep, ep->freqn = get_usb_high_speed_rate(rate); ep->fps = 8000; } + ep->fps >>= ep->datainterval; ep->sample_rem = rate % ep->fps; ep->framesize[0] = rate / ep->fps; -- 2.27.0