[PATCH] Make mousedev.c report all events to user space immediately

mousedev_packet() clears list->ready too early when called with
"tail == head - 1".  The effect is that the last mouse event from the
hardware isn't reported to userspace until another hardware mouse
event arrives.  This can make the left mouse button get stuck when
tapping on a touchpad.  When this happens, the butten doesn't unstick
until you interact with the touchpad again.
Signed-off-by: Peter Osterlund <petero2@telia.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/input/mousedev.c

@@ -467,10 +467,10 @@ static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
 	}
 
 	if (!p->dx && !p->dy && !p->dz) {
-		if (list->tail != list->head)
-			list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
 		if (list->tail == list->head)
 			list->ready = 0;
+		else
+			list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
 	}
 
 	spin_unlock_irqrestore(&list->packet_lock, flags);