--- drivers/usb/serial/pl2303.c

+++ drivers/usb/serial/pl2303.c

@@ -59,6 +59,8 @@ static struct usb_device_id id_table []

{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },

{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },

{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },

+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },

+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },

{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },

{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },

{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },

@@ -955,9 +957,11 @@ static void pl2303_update_line_status(st

{

struct pl2303_private *priv = usb_get_serial_port_data(port);

+ struct tty_struct *tty;

unsigned long flags;

u8 status_idx = UART_STATE;

u8 length = UART_STATE + 1;

+ u8 prev_line_status;

u16 idv, idp;

idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);

@@ -979,11 +983,20 @@ static void pl2303_update_line_status(st

/* Save off the uart status for others to look at */

spin_lock_irqsave(&priv->lock, flags);

+ prev_line_status = priv->line_status;

priv->line_status = data[status_idx];

spin_unlock_irqrestore(&priv->lock, flags);

if (priv->line_status & UART_BREAK_ERROR)

usb_serial_handle_break(port);

wake_up_interruptible(&priv->delta_msr_wait);

+

+ tty = tty_port_tty_get(&port->port);

+ if (!tty)

+ return;

+ if ((priv->line_status ^ prev_line_status) & UART_DCD)

+ usb_serial_handle_dcd_change(port, tty,

+ priv->line_status & UART_DCD);

+ tty_kref_put(tty);

}

static void pl2303_read_int_callback(struct urb *urb)