From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Mon, 17 Feb 2014 21:27:30 +0000 (-0700)
Subject: staging: comedi: pcl818: tidy up dma buffer allocation
X-Git-Tag: v3.15-rc1~139^2~952
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f5cc425afed63820734f130fc245ba7bb11c11ac;p=pandora-kernel.git

staging: comedi: pcl818: tidy up dma buffer allocation

This driver uses 2 buffers for DMA. Refactor the buffer allocation to
use a for loop to remove code duplication. Remove the dev_err() messages
when __get_dma_pages() fails and change the errno returned from -EBUSY
to -ENOMEM.

Both buffers are the same size so replace the 'dmapages' and 'hwdmasize'
arrays in the private data with variables to save a bit of space.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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