From 23939115be181bc5dbc33aa8471adcdbffa28910 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 1 Oct 2021 12:54:25 +0200
Subject: [PATCH] ALSA: usb-audio: Fix packet size calculation regression
Git-commit: 23939115be181bc5dbc33aa8471adcdbffa28910
Patch-mainline: v5.16-rc1
References: bsc#1192354
The commit d215f63d49da ("ALSA: usb-audio: Check available frames for
the next packet size") introduced the available frame size check, but
the conversion forgot to initialize the temporary variable properly,
and it resulted in a bogus calculation. This patch fixes it.
Fixes: d215f63d49da ("ALSA: usb-audio: Check available frames for the next packet size")
Reported-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20211001104417.14291-1-colin.king@canonical.com
Link: https://lore.kernel.org/r/20211001105425.16191-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/usb/endpoint.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 42c0d2db8ba8..743b8287cfcd 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -182,7 +182,7 @@ static int next_packet_size(struct snd_usb_endpoint *ep, unsigned int avail)
if (ep->fill_max)
return ep->maxframesize;
- sample_accum += ep->sample_rem;
+ sample_accum = ep->sample_accum + ep->sample_rem;
if (sample_accum >= ep->pps) {
sample_accum -= ep->pps;
ret = ep->packsize[1];
--
2.26.2