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Commit d14654df authored by Paul Chavent's avatar Paul Chavent Committed by Greg Kroah-Hartman
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USB: serial: call handle_dcd_change in ftdi driver. 



When the device receive a DCD status change, forward the signal to the
USB serial system. This way, we can detect, for instance, PPS pulses.

Signed-off-by: default avatarPaul Chavent <paul.chavent@onera.fr>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent db8f2aa3

drivers/usb/serial/ftdi_sio.c

+9 −1
Original line number Diff line number Diff line
@@ -1966,8 +1966,16 @@ static int ftdi_process_packet(struct usb_serial_port *port, 
			port->icount.dsr++;

		if (diff_status & FTDI_RS0_RI)

			port->icount.rng++;

		if (diff_status & FTDI_RS0_RLSD)

		if (diff_status & FTDI_RS0_RLSD) {

			struct tty_struct *tty;



			port->icount.dcd++;

			tty = tty_port_tty_get(&port->port);

			if (tty)

				usb_serial_handle_dcd_change(port, tty,

						status & FTDI_RS0_RLSD);

			tty_kref_put(tty);

		}



		wake_up_interruptible(&port->port.delta_msr_wait);

		priv->prev_status = status;