powerpc: Use the newly added get_required_mask dma_map_ops hook
Now that the generic code has dma_map_ops set, instead of having a messy ifdef & if block in the base dma_get_required_mask hook push the computation into the dma ops. If the ops fails to set the get_required_mask hook default to the width of dma_addr_t. This also corrects ibmbus ibmebus_dma_supported to require a 64 bit mask. I doubt anything is checking or setting the dma mask on that bus. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Cc: benh@kernel.crashing.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Benjamin Herrenschmidt
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@ -37,4 +37,6 @@ struct pdev_archdata {
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u64 dma_mask;
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};
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#define ARCH_HAS_DMA_GET_REQUIRED_MASK
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#endif /* _ASM_POWERPC_DEVICE_H */
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