Something

bash-3.2$ diff -C 5 common-pci.c~ common-pci.c
*** common-pci.c~       2007-07-07 14:17:55.000000000 +0930
--- common-pci.c        2007-07-27 23:22:05.000000000 +0930
***************
*** 321,332 ****
--- 321,337 ----
  static int ixp4xx_pci_platform_notify(struct device *dev)
  {
        if(dev->bus == &pci_bus_type) {
                *dev->dma_mask =  SZ_64M - 1;
                dev->coherent_dma_mask = SZ_64M - 1;
+               printk("ixp4xx_pci_platform_notify - dmabounce_register_dev called");
                dmabounce_register_dev(dev, 2048, 4096);
        }
+       else {
+               printk("ixp4xx_pci_platform_notify - dmabounce_register_dev not called");
+       }
+
        return 0;
  }

  static int ixp4xx_pci_platform_notify_remove(struct device *dev)
  {