From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 23 Nov 2012 15:00:37 +0000 (+0100)
Subject: ALSA: usb-audio: fix delay account during pause
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~39^2~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=48779a0b8ffc45f7f2b519ef462a72b1c5208d09;p=pandora-kernel.git

ALSA: usb-audio: fix delay account during pause

When a playback stream is paused, the stream isn't actually stopped,
thus we still need to take care of the in-flight data amount for the
delay calculation.  Otherwise the value of subs->last_delay is no
longer reliable and can give a bogus value after resuming from pause.
This will result in "delay: estimated XX, actual YY" error messages.

Also, during pause after all in flight data are processed
(i.e. last_delay = 0), we don't have to calculate the actual delay
from the current frame.  Give a short path in such a case.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
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