staging: comedi: pcl818: tidy up dma buffer allocation

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This driver uses 2 buffers for DMA. Refactor the buffer allocation to
use a for loop to remove code duplication. Remove the dev_err() messages
when __get_dma_pages() fails and change the errno returned from -EBUSY
to -ENOMEM.

Both buffers are the same size so replace the 'dmapages' and 'hwdmasize'
arrays in the private data with variables to save a bit of space.

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 2014-02-17 14:27:30 -07:00 • committed by Greg Kroah-Hartman

parent 55b95f1430

commit f5cc425afe

1 changed files with 28 additions and 33 deletions

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drivers/staging/comedi/drivers/pcl818.c

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