[PATCH] pci: use pin stored in pci_dev

Use the stored value of the interrupt pin rather than try to read
the config again.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/pci/pci.c

@@ -587,7 +587,7 @@ pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)
 {
 	u8 pin;
 
-	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+	pin = dev->pin;
 	if (!pin)
 		return -1;
 	pin--;