pvcalls-front: wait for other operations to return when release passi…

…ve sockets Passive sockets can have ongoing operations on them, specifically, we have two wait_event_interruptable calls in pvcalls_front_accept. Add two wake_up calls in pvcalls_front_release, then wait for the potential waiters to return and release the sock_mapping refcount. Signed-off-by: Stefano Stabellini <[email protected]> Acked-by: Juergen Gross <[email protected]> Signed-off-by: Juergen Gross <[email protected]>
ambv · Feb 17, 2018 · d1a75e0 · d1a75e0
1 parent 64d6871
commit d1a75e0
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
@@ -1018,6 +1018,12 @@ int pvcalls_front_release(struct socket *sock)
 
 		pvcalls_front_free_map(bedata, map);
 	} else {
+		wake_up(&bedata->inflight_req);
+		wake_up(&map->passive.inflight_accept_req);
+
+		while (atomic_read(&map->refcount) > 1)
+			cpu_relax();
+
 		spin_lock(&bedata->socket_lock);
 		list_del(&map->list);
 		spin_unlock(&bedata->socket_lock);