Index: linux-2.6.28/arch/powerpc/sysdev/ppc4xx_pci.c
===================================================================
--- linux-2.6.28.orig/arch/powerpc/sysdev/ppc4xx_pci.c	2009-03-19 17:46:18.000000000 +0100
+++ linux-2.6.28/arch/powerpc/sysdev/ppc4xx_pci.c	2009-03-19 17:46:55.000000000 +0100
@@ -1591,7 +1591,9 @@
 	if (!port->endpoint) {
 		/* Set Class Code to PCI-PCI bridge and Revision Id to 1 */
 		out_le32(mbase + 0x208, 0x06040001);
-
+		printk(KERN_INFO "maximum payload size 512 bytes.\n");
+		/* maximum payload size 512 bytes */
+		out_le32(mbase + 0x25C, 0x00000002);
 		printk(KERN_INFO "PCIE%d: successfully set as root-complex\n",
 		       port->index);
 	} else {