From: Thomas Pugliese <thomas.pugliese@gmail.com>
Date: Fri, 7 Mar 2014 21:37:34 +0000 (-0600)
Subject: usb: wusbcore: combine iso transfer result frame reads when possible
X-Git-Tag: v3.15-rc1~137^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04a378f36d9dc9e242ff206fcad23ba258dba818;p=pandora-kernel.git

usb: wusbcore: combine iso transfer result frame reads when possible

When reading the transfer result data for an isochronous in request, if
the current frame actual_length is contiguous with the next frame and
actual_length is a multiple of the DTI endpoint max packet size, combine
the current frame with the next frame in a single URB.  This reduces the
number of URBs that must be submitted in that case which increases
performance and reduces CPU interrupt overhead.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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