From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Tue, 13 Jan 2015 17:16:41 +0000 (-0700)
Subject: staging: comedi: ni_labpc_isadma: move dma programming out of labpc_drain_dma()
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~83^2~379
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f2c6bbe8e02d589a02282c2a260f912ab4f12376;p=pandora-kernel.git

staging: comedi: ni_labpc_isadma: move dma programming out of labpc_drain_dma()

The external caller of labpc_drain_dma() does not enable the DMA transfer. Only
the call from handle_isa_dma() results in the programmed DMA operation getting
enabled.

For aesthetics, move the dma programming to handle_isa_dma(). Make sure the
DMA operation would actually do something (dma->size != 0) before programming
it to avoid enabling the DMA at the end of a stop_src == TRIG_COUNT command.

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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