Commit d984fe91 authored Jan 02, 2014 by Johan Hovold Committed by Greg Kroah-Hartman Jan 03, 2014

USB: ch341: only wake up MSR queue on changes



Only wake up MSR wait queue on actual modem-status changes.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent fd74b0b1

drivers/usb/serial/ch341.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -460,6 +460,9 @@ static void ch341_update_line_status(struct usb_serial_port *port,
		if (data[1] & CH341_MULT_STAT)
		dev_dbg(&port->dev, "%s - multiple status change\n", __func__);

		if (!delta)
		return;

		if (delta & CH341_BIT_DCD) {
		tty = tty_port_tty_get(&port->port);
		if (tty) {