Commit d984fe91 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman

USB: ch341: only wake up MSR queue on changes

Only wake up MSR wait queue on actual modem-status changes.
Signed-off-by: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fd74b0b1
...@@ -460,6 +460,9 @@ static void ch341_update_line_status(struct usb_serial_port *port, ...@@ -460,6 +460,9 @@ static void ch341_update_line_status(struct usb_serial_port *port,
if (data[1] & CH341_MULT_STAT) if (data[1] & CH341_MULT_STAT)
dev_dbg(&port->dev, "%s - multiple status change\n", __func__); dev_dbg(&port->dev, "%s - multiple status change\n", __func__);
if (!delta)
return;
if (delta & CH341_BIT_DCD) { if (delta & CH341_BIT_DCD) {
tty = tty_port_tty_get(&port->port); tty = tty_port_tty_get(&port->port);
if (tty) { if (tty) {
......
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