[ARM] Orion: fix ->map_irq() PCIe bus number check

The current orion5x board ->map_irq() routines check whether a
given bus number lives on the PCIe controller by comparing it with
the PCIe controller's primary bus number.  This doesn't work in
case there are multiple buses in the PCIe domain, i.e. if there
exists a PCIe bridge on the primary PCIe bus.

This patch adds a helper function (orion5x_pci_map_irq()) that
returns the IRQ number for the given PCI device if that device has
a hard-wired IRQ, or -1 otherwise, and makes each board's
->map_irq() function use this helper function.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/arch/arm/mach-orion5x/ts209-setup.c b/arch/arm/mach-orion5x/ts209-setup.c
index fd43863a86f6..d3a892283dd0 100644
--- a/arch/arm/mach-orion5x/ts209-setup.c
+++ b/arch/arm/mach-orion5x/ts209-setup.c
@@ -141,14 +141,17 @@ void __init qnap_ts209_pci_preinit(void)
 
 static int __init qnap_ts209_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 {
+        int irq;
+
         /*
-         * PCIE IRQ is connected internally (not GPIO)
+         * Check for devices with hard-wired IRQs.
          */
-        if (dev->bus->number == orion5x_pcie_local_bus_nr())
-                return IRQ_ORION5X_PCIE0_INT;
+        irq = orion5x_pci_map_irq(dev, slot, pin);
+        if (irq != -1)
+                return irq;
 
         /*
-         * PCI IRQs are connected via GPIOs
+         * PCI IRQs are connected via GPIOs.
          */
         switch (slot - QNAP_TS209_PCI_SLOT0_OFFS) {
         case 0: