[linux-usb] 2.2 backport: How to emulatte pci_resource_len

[Alan Cox]

        pci_write_config_dword(dev, PCI_BASE_ADDRESS_0+4*i, ~0);
        pci_read_config_dword(dev, PCI_BASE_ADDRESS_0+4*i, &size);
        pci_write_config_dword(dev, PCI_BASE_ADDRESS_0+4*i, dev->base_address[i
        
        size=~(size&PCI_BASE_ADDRESS_MEM_MASK);
        size++; /* mind the fence */

I/O should be virtually identical. Hopefully that is enough info to help the
backport maintainer get perfection

Alan

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