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staging: comedi: pcl818: introduce pcl818_isadma_disable()
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Tue, 13 Jan 2015 17:16:21 +0000 (10:16 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 17 Jan 2015 22:31:29 +0000 (14:31 -0800)
commitbed8d5381c8cf34fd7511cd02bb7e312ec83addf
tree1f8fd1b543f6c51c3ea4f62a4c4e0b76a9317863tree | snapshot
parent9cf2765f5e39ffd600715a4b19e5fface154ba32commit | diff
staging: comedi: pcl818: introduce pcl818_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>
drivers/staging/comedi/drivers/pcl818.c diff | blob | history
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