Index: linux-2.6.27.y/drivers/pci/bus.c
===================================================================
--- linux-2.6.27.y.orig/drivers/pci/bus.c
+++ linux-2.6.27.y/drivers/pci/bus.c
@@ -41,6 +41,7 @@ pci_bus_alloc_resource(struct pci_bus *b
 		void *alignf_data)
 {
 	int i, ret = -ENOMEM;
+	resource_size_t max = -1;
 
 	type_mask |= IORESOURCE_IO | IORESOURCE_MEM;
 
@@ -59,10 +60,15 @@ pci_bus_alloc_resource(struct pci_bus *b
 		    !(res->flags & IORESOURCE_PREFETCH))
 			continue;
 
+		/* Limit address to 32 bits when requested */
+		if ((res->flags & IORESOURCE_MEM) &&
+		    (res->flags & IORESOURCE_PCI_32BIT))
+			max = (u32) -1;
+
 		/* Ok, try it out.. */
 		ret = allocate_resource(r, res, size,
 					r->start ? : min,
-					-1, align,
+					max, align,
 					alignf, alignf_data);
 		if (ret == 0)
 			break;
Index: linux-2.6.27.y/drivers/pci/setup-bus.c
===================================================================
--- linux-2.6.27.y.orig/drivers/pci/setup-bus.c
+++ linux-2.6.27.y/drivers/pci/setup-bus.c
@@ -433,19 +433,23 @@ static void pci_bus_size_cardbus(struct 
 	 * If we have prefetchable memory support, allocate
 	 * two regions.  Otherwise, allocate one region of
 	 * twice the size.
+	 * Avoid 64bit address space, as cardbus devices can't handle it.
 	 */
 	if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) {
 		b_res[2].start = 0;
 		b_res[2].end = pci_cardbus_mem_size - 1;
-		b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_SIZEALIGN;
+		b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH |
+			IORESOURCE_SIZEALIGN | IORESOURCE_PCI_32BIT;
 
 		b_res[3].start = 0;
 		b_res[3].end = pci_cardbus_mem_size - 1;
-		b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN;
+		b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN |
+			IORESOURCE_PCI_32BIT;
 	} else {
 		b_res[3].start = 0;
 		b_res[3].end = pci_cardbus_mem_size * 2 - 1;
-		b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN;
+		b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN |
+			IORESOURCE_PCI_32BIT;
 	}
 }
 
Index: linux-2.6.27.y/include/linux/ioport.h
===================================================================
--- linux-2.6.27.y.orig/include/linux/ioport.h
+++ linux-2.6.27.y/include/linux/ioport.h
@@ -101,6 +101,7 @@ struct resource_list {
 
 /* PCI control bits.  Shares IORESOURCE_BITS with above PCI ROM.  */
 #define IORESOURCE_PCI_FIXED		(1<<4)	/* Do not move resource */
+#define IORESOURCE_PCI_32BIT		(1<<5)	/* Do not use 64bit address space (for cardbus devices) */
 
 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
 extern struct resource ioport_resource;