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staging: comedi: addi_apci_3120: use dma_alloc_coherent()
Use `dma_alloc_coherent()` to allocate the DMA buffers instead of using `__get_free_pages()` to allocate and `virt_to_bus()` to get the hardware address. The coherent buffers are fairly small - at most 4 pages (although there are two of them). Use of `virt_to_bus()` is discouraged. Note: `struct addi_private` is used by some other ADDI-DATA drivers as well, but this is the only one using the affected members. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Ian Abbott
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Greg Kroah-Hartman
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Sep 19, 2014
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