Update use of long-deprecated pci_ dma API code to the more generic d… #17
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…ma_ API.
I can trace back dma_ to at least kernel 3.2 and I've found mention of this generic API around 2002 already, so this should work on some really old kernels too.
The only question is whether all uses actually require GFP_ATOMIC, but since pci_alloc_consistent used that, just stick with it as I don't know how to verify this.