dma_pool_alloc restrict < 4GB address

Hi,

Is there anyway to restrict the returned bus address(dma address) from dma_poll_alloc to < 4GB ? The function returns a dma address(of type dma_addr_t). Is there anyway I can ensure to restrict it to < 4B address. I guess we can do that in pci_alloc_consistent as by default it returns 32bit address.

with regards,
Anil

dma_pool_alloc (as described in the documentation ...) allocates memory using dma_alloc_coherent(). As long as you've set the coherent mask to 32-bit (or left it alone, since it's 32-bit by default ...), you'll get 32-bit dma addresses back.

Matthew Wilcox				Intel Open Source Technology Centre
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