[PATCH] apci: use pin stored in pci_dev

Use the stored value of the Interrupt Pin, rather than try to read
it again.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 09567c2edcfb..e567c03b238e 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -361,8 +361,7 @@ acpi_pci_irq_derive(struct pci_dev *dev,
 
                 if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) {
                         /* PC card has the same IRQ as its cardbridge */
-                        pci_read_config_byte(bridge, PCI_INTERRUPT_PIN,
-                                             &bridge_pin);
+                        bridge_pin = bridge->pin;
                         if (!bridge_pin) {
                                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                                   "No interrupt pin configured for device %s\n",
@@ -412,7 +411,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
         if (!dev)
                 return_VALUE(-EINVAL);
 
-        pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+        pin = dev->pin;
         if (!pin) {
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                   "No interrupt pin configured for device %s\n",
@@ -503,7 +502,7 @@ void acpi_pci_irq_disable(struct pci_dev *dev)
         if (!dev || !dev->bus)
                 return_VOID;
 
-        pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+        pin = dev->pin;
         if (!pin)
                 return_VOID;
         pin--;