From: Ursula Braun <ursula.braun@xxxxxxxxxx>
An af_iucv stress test showed -EPIPE results for sendmsg()
calls. They are caused by quiescing a path even though it has
been already severed by peer. For IUCV transport shutdown()
consists of 2 steps:
(1) sending the shutdown message to peer
(2) quiescing the iucv path
If the iucv path between these 2 steps is severed due to peer
closing the path, the quiesce step is no longer needed.
Signed-off-by: Ursula Braun <ursula.braun@xxxxxxxxxx>
Signed-off-by: Frank Blaschka <blaschka@xxxxxxxxxxxxxxxxxx>
Reported-by: Philipp Hachtmann <phacht@xxxxxxxxxxxxxxxxxx>
---
net/iucv/af_iucv.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1542,7 +1542,8 @@ static int iucv_sock_shutdown(struct soc
sk->sk_shutdown |= how;
if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) {
- if (iucv->transport == AF_IUCV_TRANS_IUCV) {
+ if ((iucv->transport == AF_IUCV_TRANS_IUCV) &&
+ iucv->path) {
err = pr_iucv->path_quiesce(iucv->path, NULL);
if (err)
err = -ENOTCONN;
--
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