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staging: comedi: pcl812: introduce pcl812_isadma_disable()
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Tue, 13 Jan 2015 17:16:34 +0000 (10:16 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 17 Jan 2015 22:31:30 +0000 (14:31 -0800)
commit0156b06a6b3ee8c42c7c404a2a8a5921b74c69f5
treeb7b20c075d363ffd84cc7d8f54dd989561169949tree | snapshot (tar.gz zip)
parent1ec64b74c9182e443e8ea26ea3d6df4cdda7e578commit | diff
staging: comedi: pcl812: introduce pcl812_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/pcl812.c diff | blob | blame | history