staging: comedi: das16 introduce das16_alloc_dma()

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DMA is optional with this driver. Introduce a helper function to request
the DMA channel and allocate the buffers. Don't fail the driver attach
if the user passed an invalid DMA channel or the channel cannot be
requested.

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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H Hartley Sweeten 2015-01-12 10:56:13 -07:00 • committed by Greg Kroah-Hartman

parent 38a7d4999a

commit 7447cd60a3

1 changed files with 38 additions and 34 deletions

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drivers/staging/comedi/drivers/das16.c

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