USB: metro-usb: fix tty_flip_buffer_push use
authorJohan Hovold <jhovold@gmail.com>
Mon, 2 Jul 2012 10:34:24 +0000 (12:34 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 5 Jul 2012 23:04:57 +0000 (16:04 -0700)
Do not set low_latency flag at open as tty_flip_buffer_push must not be
called in IRQ context with low_latency set.

Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/metro-usb.c

index 81423f7..d47eb06 100644 (file)
@@ -222,14 +222,6 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
        metro_priv->throttled = 0;
        spin_unlock_irqrestore(&metro_priv->lock, flags);
 
-       /*
-        * Force low_latency on so that our tty_push actually forces the data
-        * through, otherwise it is scheduled, and with high data rates (like
-        * with OHCI) data can get lost.
-        */
-       if (tty)
-               tty->low_latency = 1;
-
        /* Clear the urb pipe. */
        usb_clear_halt(serial->dev, port->interrupt_in_urb->pipe);