[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>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 8e287a8..81b9b8d 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -587,7 +587,7 @@
 {
 	u8 pin;
 
-	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+	pin = dev->pin;
 	if (!pin)
 		return -1;
 	pin--;