Commit 4244f830 authored by Pin-yen Lin's avatar Pin-yen Lin Committed by Greg Kroah-Hartman
Browse files

serial: 8520_mtk: Set RTS on shutdown for Rx in-band wakeup 



When Rx in-band wakeup is enabled, set RTS to true in mtk8250_shutdown()
so the connected device can still send message and trigger IRQ when the
system is suspended.

Fixes: 18c9d4a3 ("serial: When UART is suspended, set RTS to false")
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarPin-yen Lin <treapking@chromium.org>
Link: https://lore.kernel.org/r/20240424130619.2924456-1-treapking@chromium.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 70d7f142

drivers/tty/serial/8250/8250_mtk.c

+6 −2
Original line number Diff line number Diff line
@@ -209,15 +209,19 @@ static int mtk8250_startup(struct uart_port *port) 


static void mtk8250_shutdown(struct uart_port *port)

{

#ifdef CONFIG_SERIAL_8250_DMA

	struct uart_8250_port *up = up_to_u8250p(port);

	struct mtk8250_data *data = port->private_data;

	int irq = data->rx_wakeup_irq;



#ifdef CONFIG_SERIAL_8250_DMA

	if (up->dma)

		data->rx_status = DMA_RX_SHUTDOWN;

#endif



	return serial8250_do_shutdown(port);

	serial8250_do_shutdown(port);



	if (irq >= 0)

		serial8250_do_set_mctrl(&up->port, TIOCM_RTS);

}



static void mtk8250_disable_intrs(struct uart_8250_port *up, int mask)