[POWERPC] Split out the IOMMU logic from cell_dma_dev_setup()
Split the IOMMU logic out from cell_dma_dev_setup() into a separate function. If we're not using dma_direct_ops or dma_iommu_ops we don't know what the hell's going on, so BUG. Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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