USB: ssu100: fix overrun-error reporting

commit 75bcbf29c284dd0154c3e895a0bd1ef0e796160e upstream.

Fix reporting of overrun errors, which should only be reported once
using the inserted null character.

Fixes: 6b8f1ca5581b ("USB: ssu100: set tty_flags in ssu100_process_packet")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 5b62dbbdf996b53bcb4f82ea6966dae7c2fa5801..8f5f3613486402719bf559dcc7fc636761b7f4ad 100644 (file)
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -495,10 +495,9 @@ static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
                        if (*tty_flag == TTY_NORMAL)
                                *tty_flag = TTY_FRAME;
                }
-               if (lsr & UART_LSR_OE){
+               if (lsr & UART_LSR_OE) {
                        port->icount.overrun++;
-                       if (*tty_flag == TTY_NORMAL)
-                               *tty_flag = TTY_OVERRUN;
+                       tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
                }
        }
 
@@ -516,12 +515,8 @@ static void ssu100_process_read_urb(struct urb *urb)
        if ((len >= 4) &&
            (packet[0] == 0x1b) && (packet[1] == 0x1b) &&
            ((packet[2] == 0x00) || (packet[2] == 0x01))) {
-               if (packet[2] == 0x00) {
+               if (packet[2] == 0x00)
                        ssu100_update_lsr(port, packet[3], &flag);
-                       if (flag == TTY_OVERRUN)
-                               tty_insert_flip_char(&port->port, 0,
-                                               TTY_OVERRUN);
-               }
                if (packet[2] == 0x01)
                        ssu100_update_msr(port, packet[3]);