diff options
Diffstat (limited to 'drivers/usb/serial/io_ti.c')
| -rw-r--r-- | drivers/usb/serial/io_ti.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index cb4c54316cf5..541dd8e6e7a2 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -572,7 +572,7 @@ static void chase_port(struct edgeport_port *port, unsigned long timeout, int flush) { int baud_rate; - struct tty_struct *tty = port->port->port.tty; + struct tty_struct *tty = tty_port_tty_get(&port->port->port); wait_queue_t wait; unsigned long flags; @@ -599,6 +599,7 @@ static void chase_port(struct edgeport_port *port, unsigned long timeout, if (flush) edge_buf_clear(port->ep_out_buf); spin_unlock_irqrestore(&port->ep_lock, flags); + tty_kref_put(tty); /* wait for data to drain from the device */ timeout += jiffies; @@ -1554,7 +1555,7 @@ static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr) /* Save the new modem status */ edge_port->shadow_msr = msr & 0xf0; - tty = edge_port->port->port.tty; + tty = tty_port_tty_get(&edge_port->port->port); /* handle CTS flow control */ if (tty && C_CRTSCTS(tty)) { if (msr & EDGEPORT_MSR_CTS) { @@ -1564,6 +1565,7 @@ static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr) tty->hw_stopped = 1; } } + tty_kref_put(tty); return; } @@ -1574,6 +1576,7 @@ static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, struct async_icount *icount; __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); + struct tty_struct *tty; dbg("%s - %02x", __func__, new_lsr); @@ -1587,8 +1590,13 @@ static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); /* Place LSR data byte into Rx buffer */ - if (lsr_data && edge_port->port->port.tty) - edge_tty_recv(&edge_port->port->dev, edge_port->port->port.tty, &data, 1); + if (lsr_data) { + tty = tty_port_tty_get(&edge_port->port->port); + if (tty) { + edge_tty_recv(&edge_port->port->dev, tty, &data, 1); + tty_kref_put(tty); + } + } /* update input line counters */ icount = &edge_port->icount; @@ -1749,7 +1757,7 @@ static void edge_bulk_in_callback(struct urb *urb) ++data; } - tty = edge_port->port->port.tty; + tty = tty_port_tty_get(&edge_port->port->port); if (tty && urb->actual_length) { usb_serial_debug_data(debug, &edge_port->port->dev, __func__, urb->actual_length, data); @@ -1761,6 +1769,7 @@ static void edge_bulk_in_callback(struct urb *urb) urb->actual_length); edge_port->icount.rx += urb->actual_length; } + tty_kref_put(tty); exit: /* continue read unless stopped */ @@ -1796,6 +1805,7 @@ static void edge_bulk_out_callback(struct urb *urb) struct usb_serial_port *port = urb->context; struct edgeport_port *edge_port = usb_get_serial_port_data(port); int status = urb->status; + struct tty_struct *tty; dbg("%s - port %d", __func__, port->number); @@ -1818,7 +1828,9 @@ static void edge_bulk_out_callback(struct urb *urb) } /* send any buffered data */ - edge_send(port->port.tty); + tty = tty_port_tty_get(&port->port); + edge_send(tty); + tty_kref_put(tty); } static int edge_open(struct tty_struct *tty, @@ -1876,7 +1888,7 @@ static int edge_open(struct tty_struct *tty, /* set up the port settings */ if (tty) - edge_set_termios(tty, port, port->port.tty->termios); + edge_set_termios(tty, port, tty->termios); /* open up the port */ |