arch/x86/pci/irq.c: attempt to clean up code layout

		if (io_apic_assign_pci_irqs) {

			int irq;

			if (pin) {

			if (!pin)

				continue;

			/*

				 * interrupt pins are numbered starting

				 * from 1

			 * 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.

			 * 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 */

			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;

					irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,

				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",

					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_info(&dev->dev,

					"PCI->APIC IRQ transform: INT %c "

						"-> IRQ %d\n",

					'A' + pin, irq);

				dev->irq = irq;

			}

		}

		}

#endif

		/*

		 * Still no IRQ? Try to lookup one...