From: Clemens Ladisch <clemens@ladisch.de>
Date: Mon, 26 Jan 2009 07:09:28 +0000 (+0100)
Subject: sound: usb-audio: limit playback queue length
X-Git-Tag: v2.6.30-rc1~676^2~1^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d788e040b72d2a46ea3ba726b7fa0b65de06c88;p=pandora-kernel.git

sound: usb-audio: limit playback queue length

Once our URBs contain enough packets, queueing more URBs does not give
us any additional underrun protection (as we use double-buffering) but
just increases latency unnecessarily.  Therefore, we try to limit the
queue length to some reasonable value.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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