2 files changed, 18 insertions, 2 deletions

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index d41531139c55..97fa3c428435 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -175,6 +175,14 @@ int usb_serial_generic_resume(struct usb_serial *serial)
         struct usb_serial_port *port;
         int i, c = 0, r;
 
+#ifdef CONFIG_PM
+        /*
+         * If this is an autoresume, don't submit URBs.
+         * They will be submitted in the open function instead.
+         */
+        if (serial->dev->auto_pm)
+                return 0;
+#endif
         for (i = 0; i < serial->num_ports; i++) {
                 port = serial->port[i];
                 if (port->open_count && port->read_urb) {
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 5c33e2471be8..28315b05c9cc 100644
--- 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:
@@ -277,8 +282,10 @@ static void serial_close(struct tty_struct *tty, struct file * filp)
                 }
         }
 
-        if (port->open_count == 0)
+        if (port->open_count == 0) {
+                usb_autopm_put_interface(port->serial->interface);
                 module_put(port->serial->type->driver.owner);
+        }
 
         mutex_unlock(&port->mutex);
         usb_serial_put(port->serial);
@@ -1255,6 +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 */