From: Clemens Ladisch <clemens@ladisch.de>
Date: Mon, 17 Jul 2006 14:51:37 +0000 (+0200)
Subject: [ALSA] system timer: accumulate correction for multiple lost ticks
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6ed5eff025b72cb84a884d4be05f854f13b1542f;p=linux-beck.git

[ALSA] system timer: accumulate correction for multiple lost ticks

When multiple timer interrupts arrive too late, correct for all delays
instead of ignoring the earlier ones.

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 86357007259d..0f6e6727ff7c 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -971,7 +971,7 @@ static void snd_timer_s_function(unsigned long data)
 	struct snd_timer_system_private *priv = timer->private_data;
 	unsigned long jiff = jiffies;
 	if (time_after(jiff, priv->last_expires))
-		priv->correction = (long)jiff - (long)priv->last_expires;
+		priv->correction += (long)jiff - (long)priv->last_expires;
 	snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies);
 }