43f42f
parent b7eb4a06e9980973755b7e95a6d97fb8decbf8fd
author Clemens Ladisch <clemens@ladisch.de> 1232953768 +0100
committer Takashi Iwai <tiwai@suse.de> 1232985907 +0100

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>