PCI: use config space encoding in pci_get_interrupt_pin()

This patch makes pci_get_interrupt_pin() return values encoded
the same way as the "Interrupt Pin" value in PCI config space,
i.e., 1=INTA, ..., 4=INTD.

pirq_bios_set() is the only in-tree caller of pci_get_interrupt_pin()
and pci_get_interrupt_pin() is not exported.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: hpa@zytor.com
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index 373b9afe6d44..399a172f047d 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -533,7 +533,7 @@ static int pirq_bios_set(struct pci_dev *router, struct pci_dev *dev, int pirq,
 {
         struct pci_dev *bridge;
         int pin = pci_get_interrupt_pin(dev, &bridge);
-        return pcibios_set_irq_routing(bridge, pin, irq);
+        return pcibios_set_irq_routing(bridge, pin - 1, irq);
 }
 
 #endif