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Commit ee401363 authored by Bjorn Helgaas's avatar Bjorn Helgaas Committed by Len Brown
Browse files

ACPI: PCI: follow typical PCI INTx swizzling pattern 



No functional change; this just uses the typical pattern of
PCI INTx swizzling done on other architectures.

Signed-off-by: default avatarBjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 3b1ea18d

drivers/acpi/pci_irq.c

+7 −4
Original line number Original line Diff line number Diff line
@@ -399,7 +399,7 @@ static struct acpi_prt_entry * 
acpi_pci_irq_derive(struct pci_dev *dev, int pin)

acpi_pci_irq_derive(struct pci_dev *dev, int pin)

{

{

	struct acpi_prt_entry *entry = NULL;

	struct acpi_prt_entry *entry = NULL;

	struct pci_dev *bridge = dev;

	struct pci_dev *bridge;

	u8 bridge_pin = 0, orig_pin = pin;

	u8 bridge_pin = 0, orig_pin = pin;
@@ -407,9 +407,9 @@ acpi_pci_irq_derive(struct pci_dev *dev, int pin) 
	 * Attempt to derive an IRQ for this device from a parent bridge's

	 * Attempt to derive an IRQ for this device from a parent bridge's

	 * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge).

	 * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge).

	 */

	 */

	while (bridge->bus->self) {

	bridge = dev->bus->self;

		pin = (((pin - 1) + PCI_SLOT(bridge->devfn)) % 4) + 1;

	while (bridge) {

		bridge = bridge->bus->self;

		pin = (((pin - 1) + PCI_SLOT(dev->devfn)) % 4) + 1;





		if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) {

		if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) {

			/* PC card has the same IRQ as its cardbridge */

			/* PC card has the same IRQ as its cardbridge */
@@ -431,6 +431,9 @@ acpi_pci_irq_derive(struct pci_dev *dev, int pin) 
					 pci_name(bridge)));

					 pci_name(bridge)));

			return entry;

			return entry;

		}

		}



		dev = bridge;

		bridge = dev->bus->self;

	}

	}





	dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n",

	dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n",