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staging: comedi: dt282x: introduce dt282x_isadma_disable()
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Tue, 13 Jan 2015 17:16:25 +0000 (10:16 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 17 Jan 2015 22:31:29 +0000 (14:31 -0800)
commit7877445b5c1bb10078ef72db65df1553f4cbd73e
tree45f74a0cd2906413e7cb1aa10ee3d4f59af81260tree | snapshot (tar.gz zip)
parentf609c29dfb7a5729bfab9384fad45fbf12653c67commit | diff
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>
drivers/staging/comedi/drivers/dt282x.c diff | blob | blame | history