Commit 98405f81 authored by Ji-Ze Hong (Peter Hong)'s avatar Ji-Ze Hong (Peter Hong) Committed by Johan Hovold
Browse files

USB: serial: f81232: add tx_empty function 



Add tx_empty() function for F81232. Without this, console redirection will
get garbage data.

Signed-off-by: default avatarJi-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent 1afd37c6

drivers/usb/serial/f81232.c

+15 −0
Original line number Diff line number Diff line
@@ -685,6 +685,20 @@ static void f81232_dtr_rts(struct usb_serial_port *port, int on) 
		f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);

}



static bool f81232_tx_empty(struct usb_serial_port *port)

{

	int status;

	u8 tmp;



	status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);

	if (!status) {

		if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT)

			return false;

	}



	return true;

}



static int f81232_carrier_raised(struct usb_serial_port *port)

{

	u8 msr;
@@ -820,6 +834,7 @@ static struct usb_serial_driver f81232_device = { 
	.tiocmget =		f81232_tiocmget,

	.tiocmset =		f81232_tiocmset,

	.tiocmiwait =		usb_serial_generic_tiocmiwait,

	.tx_empty =		f81232_tx_empty,

	.process_read_urb =	f81232_process_read_urb,

	.read_int_callback =	f81232_read_int_callback,

	.port_probe =		f81232_port_probe,