Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> writes: > I think this is the wrong place. If your platform can't do MMIO properly > then the platform pci_iomap or pci quirk code should do the needed > cleaning up, not put turds into the drivers. Why not just quirk it on your > specific platform and clear the MMIO mapping. We need to use the MMIO BAR at least for starting DMA transfers, the I/O ones are 64KB-limited. We can't just use read[bw] if reading all 32 bits has side effects. Most of the time there are no problems with MMIO on IXP4xx as modern devices usually use 32-bit registers anyway, or at least they have no problem with read[bw] always driving all four PCI byte enable lines (write[bw] doesn't have this issue). -- Krzysztof Halasa -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
