diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -2200,6 +2200,7 @@ static struct pci_driver serial_pci_driv
 
 static int __init serial8250_pci_init(void)
 {
+	printk(KERN_INFO "Serial: 8250/16550 PCI driver\n");
 	return pci_register_driver(&serial_pci_driver);
 }
 
diff --git a/drivers/serial/8250_pnp.c b/drivers/serial/8250_pnp.c
--- a/drivers/serial/8250_pnp.c
+++ b/drivers/serial/8250_pnp.c
@@ -450,6 +450,7 @@ static struct pnp_driver serial_pnp_driv
 
 static int __init serial8250_pnp_init(void)
 {
+	printk(KERN_INFO "Serial: 8250/16550 PNP driver\n");
 	return pnp_register_driver(&serial_pnp_driver);
 }
 
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -1947,8 +1947,9 @@ int uart_resume_port(struct uart_driver 
 static inline void
 uart_report_port(struct uart_driver *drv, struct uart_port *port)
 {
-	printk("%s%d", drv->dev_name, port->line);
-	printk(" at ");
+	if (port->dev)
+		printk("%s: ", port->dev->bus_id);
+	printk("%s%d at ", drv->dev_name, port->line);
 	switch (port->iotype) {
 	case UPIO_PORT:
 		printk("I/O 0x%x", port->iobase);