diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index bde7341..8c2813a 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -270,7 +270,6 @@
 static int sl82c105_bridge_revision(struct pci_dev *pdev)
 {
 	struct pci_dev *bridge;
-	u8 rev;
 
 	/*
 	 * The bridge should be part of the same device, but function 0.
@@ -292,10 +291,8 @@
 	/*
 	 * We need to find function 0's revision, not function 1
 	 */
-	pci_read_config_byte(bridge, PCI_REVISION_ID, &rev);
-
 	pci_dev_put(bridge);
-	return rev;
+	return bridge->revision;
 }