From: Clemens Ladisch <clemens@ladisch.de>
Date: Thu, 18 Nov 2010 08:53:07 +0000 (+0100)
Subject: ALSA: pcm: optimize xrun detection in no-period-wakeup mode
X-Git-Tag: v2.6.38-rc1~236^2~2^2~55
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47228e48aecdbec423a1275a5e27697d47f1f912;p=pandora-kernel.git

ALSA: pcm: optimize xrun detection in no-period-wakeup mode

Add a lightweight condition on top of the xrun checking so that we can
avoid the division when the application is calling the update function
often enough.

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