Hello Alan, > All drivers set a PCI DMA mask. If the kernel is not bouncing > buffers and ensuring the buffers are below the 32bit bus > address limit by default then the architecture kernel code > needs fixing. The drivers don't deal with this matter beyond > setting their PCI DMA range mask. Thanks! I'm not that familiar with all parts of the Linux kernel. What should I be looking for in order to find the relevant bits in the arch-port code? Thanks, Mark