diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c
index 0c6aa990db3d..2bb30e688433 100644
--- a/drivers/tty/serial/8250/8250_lpss.c
+++ b/drivers/tty/serial/8250/8250_lpss.c
@@ -170,6 +170,7 @@ static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port)
 
 	chip->pdata = &qrk_serial_dma_pdata;
 	chip->dev = &pdev->dev;
+	chip->id = pdev->devfn;
 	chip->irq = pci_irq_vector(pdev, 0);
 	chip->regs = pci_ioremap_bar(pdev, 1);
 	if (!chip->regs)