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Message-Id: <20211206145610.508041897@linuxfoundation.org>
Date: Mon, 6 Dec 2021 15:54:23 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Colin Ian King <colin.king@...onical.com>,
Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 5.15 009/207] ALSA: usb-audio: Fix packet size calculation regression
From: Takashi Iwai <tiwai@...e.de>
commit 23939115be181bc5dbc33aa8471adcdbffa28910 upstream.
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@...onical.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@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
sound/usb/endpoint.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -182,7 +182,7 @@ static int next_packet_size(struct snd_u
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];
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