--- g26.orig/drivers/usb/core/hub.c	2007-10-20 11:10:41.000000000 -0700
+++ g26/drivers/usb/core/hub.c	2007-10-20 11:53:04.000000000 -0700
@@ -428,15 +429,22 @@ static void hub_tt_kevent (struct work_s
 		clear = list_entry (temp, struct usb_tt_clear, clear_list);
 		list_del (&clear->clear_list);
 
-		/* drop lock so HCD can concurrently report other TT errors */
-		spin_unlock_irqrestore (&hub->tt.lock, flags);
-		status = hub_clear_tt_buffer (hdev, clear->devinfo, clear->tt);
-		spin_lock_irqsave (&hub->tt.lock, flags);
+		/* Unless we know the device was disconnected from a
+		 * multi-TT hub, clear the TT error.  Drop the TT lock
+		 * while we do that; the HCD may need to concurrently
+		 * report other TT errors
+		 */
+		if (!hub->tt.multi || hdev->children[clear->tt - 1]) {
+			spin_unlock_irqrestore(&hub->tt.lock, flags);
+			status = hub_clear_tt_buffer(hdev, clear->devinfo,
+					clear->tt);
+			spin_lock_irqsave(&hub->tt.lock, flags);
 
-		if (status)
-			dev_err (&hdev->dev,
-				"clear tt %d (%04x) error %d\n",
-				clear->tt, clear->devinfo, status);
+			if (status)
+				dev_err(&hdev->dev,
+					"clear tt %d (%04x) error %d\n",
+					clear->tt, clear->devinfo, status);
+		}
 		kfree(clear);
 	}
 	spin_unlock_irqrestore (&hub->tt.lock, flags);