tty: usb-serial krefs

[linux-2.6-omap-h63xx.git] / drivers / usb / serial / digi_acceleport.c

diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 240aad1acaab80f8a802b6b67cd4f3ffed911a9d..5756ac6d6c923ccf30a4ba66f2c036599bf203cd 100644 (file)
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -604,7 +604,9 @@ static void digi_wakeup_write_lock(struct work_struct *work)
 
 static void digi_wakeup_write(struct usb_serial_port *port)
 {
-       tty_wakeup(port->port.tty);
+       struct tty_struct *tty = tty_port_tty_get(&port->port);
+       tty_wakeup(tty);
+       tty_kref_put(tty);
 }
 
 
@@ -1668,7 +1670,7 @@ static int digi_read_inb_callback(struct urb *urb)
 {
 
        struct usb_serial_port *port = urb->context;
-       struct tty_struct *tty = port->port.tty;
+       struct tty_struct *tty;
        struct digi_port *priv = usb_get_serial_port_data(port);
        int opcode = ((unsigned char *)urb->transfer_buffer)[0];
        int len = ((unsigned char *)urb->transfer_buffer)[1];
@@ -1692,6 +1694,7 @@ static int digi_read_inb_callback(struct urb *urb)
                return -1;
        }
 
+       tty = tty_port_tty_get(&port->port);
        spin_lock(&priv->dp_port_lock);
 
        /* check for throttle; if set, do not resubmit read urb */
@@ -1735,6 +1738,7 @@ static int digi_read_inb_callback(struct urb *urb)
                }
        }
        spin_unlock(&priv->dp_port_lock);
+       tty_kref_put(tty);
 
        if (opcode == DIGI_CMD_RECEIVE_DISABLE)
                dbg("%s: got RECEIVE_DISABLE", __func__);
@@ -1760,6 +1764,7 @@ static int digi_read_oob_callback(struct urb *urb)
 
        struct usb_serial_port *port = urb->context;
        struct usb_serial *serial = port->serial;
+       struct tty_struct *tty;
        struct digi_port *priv = usb_get_serial_port_data(port);
        int opcode, line, status, val;
        int i;
@@ -1787,10 +1792,11 @@ static int digi_read_oob_callback(struct urb *urb)
                if (priv == NULL)
                        return -1;
 
+               tty = tty_port_tty_get(&port->port);
                rts = 0;
                if (port->port.count)
-                       rts = port->port.tty->termios->c_cflag & CRTSCTS;
-
+                       rts = tty->termios->c_cflag & CRTSCTS;
+               
                if (opcode == DIGI_CMD_READ_INPUT_SIGNALS) {
                        spin_lock(&priv->dp_port_lock);
                        /* convert from digi flags to termiox flags */
@@ -1798,14 +1804,14 @@ static int digi_read_oob_callback(struct urb *urb)
                                priv->dp_modem_signals |= TIOCM_CTS;
                                /* port must be open to use tty struct */
                                if (rts) {
-                                       port->port.tty->hw_stopped = 0;
+                                       tty->hw_stopped = 0;
                                        digi_wakeup_write(port);
                                }
                        } else {
                                priv->dp_modem_signals &= ~TIOCM_CTS;
                                /* port must be open to use tty struct */
                                if (rts)
-                                       port->port.tty->hw_stopped = 1;
+                                       tty->hw_stopped = 1;
                        }
                        if (val & DIGI_READ_INPUT_SIGNALS_DSR)
                                priv->dp_modem_signals |= TIOCM_DSR;
@@ -1830,6 +1836,7 @@ static int digi_read_oob_callback(struct urb *urb)
                } else if (opcode == DIGI_CMD_IFLUSH_FIFO) {
                        wake_up_interruptible(&priv->dp_flush_wait);
                }
+               tty_kref_put(tty);
        }
        return 0;