staging: comedi: ni_at_a2150: introduce a2150_alloc_irq_dma()

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This driver requires an IRQ and DMA in order to support async commands.

For aesthetics, introduce a helper function to request the IRQ and DMA
channels and allocate the DMA buffer. Since the async command support
is optional, make the helper function handle any request/allocation
errors and allow the driver to still attach without async command support.

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 10:55:48 -07:00 • committed by Greg Kroah-Hartman

parent 2447a27c87

commit 7cbb0ef93a

1 changed files with 46 additions and 28 deletions

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drivers/staging/comedi/drivers/ni_at_a2150.c

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