From d1a75e0896f5e9f5cb6a979caaea39f1f4b9feb1 Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Wed, 14 Feb 2018 10:28:24 -0800 Subject: pvcalls-front: wait for other operations to return when release passive 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 Acked-by: Juergen Gross Signed-off-by: Juergen Gross --- drivers/xen/pvcalls-front.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c index 11ce470b41a5..aedbee3b2838 100644 --- 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); -- cgit v1.2.3-70-g09d2