From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Tue, 13 Jan 2015 17:16:25 +0000 (-0700)
Subject: staging: comedi: dt282x: introduce dt282x_isadma_disable()
X-Git-Tag: fixes-v4.0-rc1~99^2~395
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7877445b5c1bb10078ef72db65df1553f4cbd73e;p=pandora-kernel.git

staging: comedi: dt282x: introduce dt282x_isadma_disable()

According to Documentation/DMA-ISA-LPC.txt, the DMA lock needs to be
claimed before using any of the ISA DMA routines. Introduce a helper
function to disable the ISA DMA controller and add the necessary
locking calls.

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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