WUSB: disconnect all devices when stopping a WUSB HCD

Make sure all WUSB devices are disconnected when stopping a WUSB HCD so
that we don't leak the devices' wusb_dev structures.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 13 insertions, 6 deletions

diff --git a/drivers/usb/wusbcore/devconnect.c b/drivers/usb/wusbcore/devconnect.c
index 386eaa22d215..63f200e4efb1 100644
--- a/drivers/usb/wusbcore/devconnect.c
+++ b/drivers/usb/wusbcore/devconnect.c
@@ -396,7 +396,8 @@ static void __wusbhc_dev_disconnect(struct wusbhc *wusbhc,
 
         /* After a device disconnects, change the GTK (see [WUSB]
          * section 6.2.11.2). */
-        wusbhc_gtk_rekey(wusbhc);
+        if (wusbhc->active)
+                wusbhc_gtk_rekey(wusbhc);
 
         /* The Wireless USB part has forgotten about the device already; now
          * khubd's timer will pick up the disconnection and remove the USB
@@ -1084,15 +1085,21 @@ error_mmcie_set:
  * wusbhc_devconnect_stop - stop managing connected devices
  * @wusbhc: the WUSB HC
  *
- * Removes the Host Info IE and stops the keep alives.
- *
- * FIXME: should this disconnect all devices?
+ * Disconnects any devices still connected, stops the keep alives and
+ * removes the Host Info IE.
  */
 void wusbhc_devconnect_stop(struct wusbhc *wusbhc)
 {
-        cancel_delayed_work_sync(&wusbhc->keep_alive_timer);
-        WARN_ON(!list_empty(&wusbhc->cack_list));
+        int i;
 
+        mutex_lock(&wusbhc->mutex);
+        for (i = 0; i < wusbhc->ports_max; i++) {
+                if (wusbhc->port[i].wusb_dev)
+                        __wusbhc_dev_disconnect(wusbhc, &wusbhc->port[i]);
+        }
+        mutex_unlock(&wusbhc->mutex);
+
+        cancel_delayed_work_sync(&wusbhc->keep_alive_timer);
         wusbhc_mmcie_rm(wusbhc, &wusbhc->wuie_host_info->hdr);
         kfree(wusbhc->wuie_host_info);
         wusbhc->wuie_host_info = NULL;