diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 3814fc9b1145..0cb0431ee19c 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -1230,11 +1230,11 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	INIT_LIST_HEAD(&priv->pgdir_list);
 	mutex_init(&priv->pgdir_mutex);
 
-	pci_read_config_byte(pdev, PCI_REVISION_ID, &dev->rev_id);
-
 	INIT_LIST_HEAD(&priv->bf_list);
 	mutex_init(&priv->bf_mutex);
 
+	dev->rev_id = pdev->revision;
+
 	/*
 	 * Now reset the HCA before we touch the PCI capabilities or
 	 * attempt a firmware command, since a boot ROM may have left