diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index e82d7d521010b3a4fd5d272e8f5b46da1c983a3b..0c101a7470b0eedb6306f3bca609b097ecac7b27 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -3384,17 +3384,8 @@ static const struct pci_device_id blacklist[] = {
 	{ PCI_VDEVICE(COMMTECH, PCI_ANY_ID), },
 };
 
-/*
- * Given a complete unknown PCI device, try to use some heuristics to
- * guess what the configuration might be, based on the pitiful PCI
- * serial specs.  Returns 0 on success, 1 on failure.
- */
-static int
-serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
+static int serial_pci_is_class_communication(struct pci_dev *dev)
 {
-	const struct pci_device_id *bldev;
-	int num_iomem, num_port, first_port = -1, i;
-
 	/*
 	 * If it is not a communications device or the programming
 	 * interface is greater than 6, give up.
@@ -3407,6 +3398,13 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
 	    (dev->class & 0xff) > 6)
 		return -ENODEV;
 
+	return 0;
+}
+
+static int serial_pci_is_blacklisted(struct pci_dev *dev)
+{
+	const struct pci_device_id *bldev;
+
 	/*
 	 * Do not access blacklisted devices that are known not to
 	 * feature serial ports or are handled by other modules.
@@ -3419,6 +3417,19 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
 			return -ENODEV;
 	}
 
+	return 0;
+}
+
+/*
+ * Given a complete unknown PCI device, try to use some heuristics to
+ * guess what the configuration might be, based on the pitiful PCI
+ * serial specs.  Returns 0 on success, -ENODEV on failure.
+ */
+static int
+serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
+{
+	int num_iomem, num_port, first_port = -1, i;
+
 	num_iomem = num_port = 0;
 	for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) {
 		if (pci_resource_flags(dev, i) & IORESOURCE_IO) {
@@ -3639,6 +3650,14 @@ pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
 
 	board = &pci_boards[ent->driver_data];
 
+	rc = serial_pci_is_class_communication(dev);
+	if (rc)
+		return rc;
+
+	rc = serial_pci_is_blacklisted(dev);
+	if (rc)
+		return rc;
+
 	rc = pcim_enable_device(dev);
 	pci_save_state(dev);
 	if (rc)