[ARM] Orion: Fix boot crash on Kurobox Pro

The Kurobox Pro crashes when any of the PCI controller registers
are accessed. This patch adds a function to the Orion PCI handling
code that board support code can call to disable enumerating the
PCI bus entirely, and makes the Kurobox Pro PCI-related init code
call this function.

Signed-off-by: Per Andersson <[e-mail]>
Signed-off-by: Lennert Buytenhek <[e-mail]>

arch/arm/mach-orion5x/common.h

···
 struct pci_sys_data;
 
 void orion5x_pcie_id(u32 *dev, u32 *rev);
+void orion5x_pci_disable(void);
 void orion5x_pci_set_cardbus_mode(void);
 int orion5x_pci_sys_setup(int nr, struct pci_sys_data *sys);
 struct pci_bus *orion5x_pci_sys_scan_bus(int nr, struct pci_sys_data *sys);

arch/arm/mach-orion5x/kurobox_pro-setup.c

···
 
 static int __init kurobox_pro_pci_init(void)
 {
-	if (machine_is_kurobox_pro())
+	if (machine_is_kurobox_pro()) {
+		orion5x_pci_disable();
 		pci_common_init(&kurobox_pro_pci);
+	}
 
 	return 0;
 }

arch/arm/mach-orion5x/pci.c

···
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_ANY_ID, rc_pci_fixup);
 
+static int orion5x_pci_disabled __initdata;
+
+void __init orion5x_pci_disable(void)
+{
+	orion5x_pci_disabled = 1;
+}
+
 void __init orion5x_pci_set_cardbus_mode(void)
 {
 	orion5x_pci_cardbus_mode = 1;
···
 	if (nr == 0) {
 		orion_pcie_set_local_bus_nr(PCIE_BASE, sys->busnr);
 		ret = pcie_setup(sys);
-	} else if (nr == 1) {
+	} else if (nr == 1 && !orion5x_pci_disabled) {
 		orion5x_pci_set_bus_nr(sys->busnr);
 		ret = pci_setup(sys);
 	}
···
 
 	if (nr == 0) {
 		bus = pci_scan_bus(sys->busnr, &pcie_ops, sys);
-	} else if (nr == 1) {
+	} else if (nr == 1 && !orion5x_pci_disabled) {
 		bus = pci_scan_bus(sys->busnr, &pci_ops, sys);
 	} else {
 		bus = NULL;
···
 	/*
 	 * PCIe endpoint?
 	 */
-	if (bus < orion5x_pci_local_bus_nr())
+	if (orion5x_pci_disabled || bus < orion5x_pci_local_bus_nr())
 		return IRQ_ORION5X_PCIE0_INT;
 
 	return -1;