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authorDavid Woodhouse <David.Woodhouse@intel.com>2008-10-13 17:13:56 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2008-10-13 17:13:56 +0100
commite758936e02700ff88a0b08b722a3847b95283ef2 (patch)
tree50c919bef1b459a778b85159d5929de95b6c4a01 /arch/x86/pci/irq.c
parent239cfbde1f5843c4a24199f117d5f67f637d72d5 (diff)
parent4480f15b3306f43bbb0310d461142b4e897ca45b (diff)
downloadlinux-rt-e758936e02700ff88a0b08b722a3847b95283ef2.tar.gz
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: include/asm-x86/statfs.h
Diffstat (limited to 'arch/x86/pci/irq.c')
-rw-r--r--arch/x86/pci/irq.c67
1 files changed, 38 insertions, 29 deletions
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index 8e077185e185..006599db0dc7 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -1043,35 +1043,44 @@ static void __init pcibios_fixup_irqs(void)
if (io_apic_assign_pci_irqs) {
int irq;
- if (pin) {
- /*
- * interrupt pins are numbered starting
- * from 1
- */
- pin--;
- irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
- PCI_SLOT(dev->devfn), pin);
- /*
- * Busses behind bridges are typically not listed in the MP-table.
- * In this case we have to look up the IRQ based on the parent bus,
- * parent slot, and pin number. The SMP code detects such bridged
- * busses itself so we should get into this branch reliably.
- */
- if (irq < 0 && dev->bus->parent) { /* go back to the bridge */
- struct pci_dev *bridge = dev->bus->self;
-
- pin = (pin + PCI_SLOT(dev->devfn)) % 4;
- irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
- PCI_SLOT(bridge->devfn), pin);
- if (irq >= 0)
- dev_warn(&dev->dev, "using bridge %s INT %c to get IRQ %d\n",
- pci_name(bridge),
- 'A' + pin, irq);
- }
- if (irq >= 0) {
- dev_info(&dev->dev, "PCI->APIC IRQ transform: INT %c -> IRQ %d\n", 'A' + pin, irq);
- dev->irq = irq;
- }
+ if (!pin)
+ continue;
+
+ /*
+ * interrupt pins are numbered starting from 1
+ */
+ pin--;
+ irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
+ PCI_SLOT(dev->devfn), pin);
+ /*
+ * Busses behind bridges are typically not listed in the
+ * MP-table. In this case we have to look up the IRQ
+ * based on the parent bus, parent slot, and pin number.
+ * The SMP code detects such bridged busses itself so we
+ * should get into this branch reliably.
+ */
+ if (irq < 0 && dev->bus->parent) {
+ /* go back to the bridge */
+ struct pci_dev *bridge = dev->bus->self;
+ int bus;
+
+ pin = (pin + PCI_SLOT(dev->devfn)) % 4;
+ bus = bridge->bus->number;
+ irq = IO_APIC_get_PCI_irq_vector(bus,
+ PCI_SLOT(bridge->devfn), pin);
+ if (irq >= 0)
+ dev_warn(&dev->dev,
+ "using bridge %s INT %c to "
+ "get IRQ %d\n",
+ pci_name(bridge),
+ 'A' + pin, irq);
+ }
+ if (irq >= 0) {
+ dev_info(&dev->dev,
+ "PCI->APIC IRQ transform: INT %c "
+ "-> IRQ %d\n",
+ 'A' + pin, irq);
+ dev->irq = irq;
}
}
#endif