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pvcalls-front: wait for other operations to return when release passive sockets

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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]>
This commit is contained in:
Stefano Stabellini 2018-02-14 10:28:24 -08:00 • committed by Juergen Gross
commit d1a75e0896
1 changed files with 6 additions and 0 deletions
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6
drivers/xen/pvcalls-front.c
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@ -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);