From: Clemens Ladisch <clemens@ladisch.de>
Date: Mon, 17 Jul 2006 14:50:56 +0000 (+0200)
Subject: [ALSA] system timer: fix lost ticks correction adjustment
X-Git-Tag: v2.6.19-rc1~1270^2~132
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=17f48ec3f15ddb8080b151304ee887c68f7e4650;p=linux-2.6

[ALSA] system timer: fix lost ticks correction adjustment

Fix the adjustment of the lost ticks correction variable in the case
when the correction has been fully taken into account in the next timer
expiration value.  Subtracting the scheduled ticks value would result in
an underflow.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
---

diff --git a/sound/core/timer.c b/sound/core/timer.c
index 7e5e562fe3..8635700725 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -987,7 +987,7 @@ static int snd_timer_s_start(struct snd_timer * timer)
 		njiff++;
 	} else {
 		njiff += timer->sticks - priv->correction;
-		priv->correction -= timer->sticks;
+		priv->correction = 0;
 	}
 	priv->last_expires = priv->tlist.expires = njiff;
 	add_timer(&priv->tlist);