USB: pl2303 usb_serial: implement sysrq handling on break

Add callbacks to process the sysrq when using a pl2303 usb device as a
console.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index e02dc3d643c7..6357b57f628c 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -927,6 +927,8 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
         spin_lock_irqsave(&priv->lock, flags);
         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);
 }
 
@@ -1037,7 +1039,8 @@ static void pl2303_read_bulk_callback(struct urb *urb)
                 if (line_status & UART_OVERRUN_ERROR)
                         tty_insert_flip_char(tty, 0, TTY_OVERRUN);
                 for (i = 0; i < urb->actual_length; ++i)
-                        tty_insert_flip_char(tty, data[i], tty_flag);
+                        if (!usb_serial_handle_sysrq_char(port, data[i]))
+                                tty_insert_flip_char(tty, data[i], tty_flag);
                 tty_flip_buffer_push(tty);
         }
         tty_kref_put(tty);