4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: "Matwey V. Kornilov" <matwey@xxxxxxxxxx> [ Upstream commit 9c4b60fe5313c125b1bf68ef04b0010512c27f2d ] When struct moxa8250_board is allocated, then num_ports should be initialized in order to use it later in moxa8250_remove. Signed-off-by: Matwey V. Kornilov <matwey@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/tty/serial/8250/8250_moxa.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/tty/serial/8250/8250_moxa.c +++ b/drivers/tty/serial/8250/8250_moxa.c @@ -68,6 +68,7 @@ static int moxa8250_probe(struct pci_dev sizeof(unsigned int) * nr_ports, GFP_KERNEL); if (!brd) return -ENOMEM; + brd->num_ports = nr_ports; memset(&uart, 0, sizeof(struct uart_8250_port));