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

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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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Thomas Pugliese 2014-03-07 15:37:34 -06:00 • committed by Greg Kroah-Hartman

parent 7338a06593

commit 04a378f36d

1 changed files with 76 additions and 30 deletions

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106

drivers/usb/wusbcore/wa-xfer.c

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