slabinfo: fall back from /sys/kernel/slab to /sys/slab

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

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 4b1bd7def4a5a32243753431ffd526952c017368..3ce98e8d7bce6103031af188dc56218693f8ac51 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -225,16 +225,21 @@ static int serial_open (struct tty_struct *tty, struct file * filp)
                        goto bailout_mutex_unlock;
                }
 
+               retval = usb_autopm_get_interface(serial->interface);
+               if (retval)
+                       goto bailout_module_put;
                /* only call the device specific open if this 
                 * is the first time the port is opened */
                retval = serial->type->open(port, filp);
                if (retval)
-                       goto bailout_module_put;
+                       goto bailout_interface_put;
        }
 
        mutex_unlock(&port->mutex);
        return 0;
 
+bailout_interface_put:
+       usb_autopm_put_interface(serial->interface);
 bailout_module_put:
        module_put(serial->type->driver.owner);
 bailout_mutex_unlock:
@@ -264,17 +269,21 @@ static void serial_close(struct tty_struct *tty, struct file * filp)
        }
 
        --port->open_count;
-       if (port->open_count == 0) {
+       if (port->open_count == 0)
                /* only call the device specific close if this 
                 * port is being closed by the last owner */
                port->serial->type->close(port, filp);
 
+       if (port->open_count == (port->console? 1 : 0)) {
                if (port->tty) {
                        if (port->tty->driver_data)
                                port->tty->driver_data = NULL;
                        port->tty = NULL;
                }
+       }
 
+       if (port->open_count == 0) {
+               usb_autopm_put_interface(port->serial->interface);
                module_put(port->serial->type->driver.owner);
        }
 
@@ -429,6 +438,8 @@ static void serial_set_termios (struct tty_struct *tty, struct ktermios * old)
        /* pass on to the driver specific version of this function if it is available */
        if (port->serial->type->set_termios)
                port->serial->type->set_termios(port, old);
+       else
+               tty_termios_copy_hw(tty->termios, old);
 }
 
 static void serial_break (struct tty_struct *tty, int break_state)
@@ -623,6 +634,7 @@ static struct usb_serial * create_serial (struct usb_device *dev,
        serial->type = driver;
        serial->interface = interface;
        kref_init(&serial->kref);
+       mutex_init(&serial->disc_mutex);
 
        return serial;
 }
@@ -1078,20 +1090,22 @@ void usb_serial_disconnect(struct usb_interface *interface)
        usb_serial_console_disconnect(serial);
        dbg ("%s", __FUNCTION__);
 
+       mutex_lock(&serial->disc_mutex);
        usb_set_intfdata (interface, NULL);
-       if (serial) {
-               for (i = 0; i < serial->num_ports; ++i) {
-                       port = serial->port[i];
-                       if (port) {
-                               if (port->tty)
-                                       tty_hangup(port->tty);
-                               kill_traffic(port);
-                       }
+       /* must set a flag, to signal subdrivers */
+       serial->disconnected = 1;
+       for (i = 0; i < serial->num_ports; ++i) {
+               port = serial->port[i];
+               if (port) {
+                       if (port->tty)
+                               tty_hangup(port->tty);
+                       kill_traffic(port);
                }
-               /* let the last holder of this object 
-                * cause it to be cleaned up */
-               usb_serial_put(serial);
        }
+       /* let the last holder of this object
+        * cause it to be cleaned up */
+       mutex_unlock(&serial->disc_mutex);
+       usb_serial_put(serial);
        dev_info(dev, "device disconnected\n");
 }
 
@@ -1101,9 +1115,6 @@ int usb_serial_suspend(struct usb_interface *intf, pm_message_t message)
        struct usb_serial_port *port;
        int i, r = 0;
 
-       if (!serial) /* device has been disconnected */
-               return 0;
-
        for (i = 0; i < serial->num_ports; ++i) {
                port = serial->port[i];
                if (port)
@@ -1121,7 +1132,9 @@ int usb_serial_resume(struct usb_interface *intf)
 {
        struct usb_serial *serial = usb_get_intfdata(intf);
 
-       return serial->type->resume(serial);
+       if (serial->type->resume)
+               return serial->type->resume(serial);
+       return 0;
 }
 EXPORT_SYMBOL(usb_serial_resume);
 
@@ -1249,6 +1262,7 @@ static void fixup_generic(struct usb_serial_driver *device)
        set_to_generic_if_null(device, read_bulk_callback);
        set_to_generic_if_null(device, write_bulk_callback);
        set_to_generic_if_null(device, shutdown);
+       set_to_generic_if_null(device, resume);
 }
 
 int usb_serial_register(struct usb_serial_driver *driver) /* must be called with BKL held */