On Wed, Nov 12, 2008 at 02:14:24PM -0800, Anil kumar wrote: > 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. 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 "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
