From 1042cab8627a2d11491e8b0dd40c4dda3180285a Mon Sep 17 00:00:00 2001 From: Ursula Braun Date: Mon, 21 Jul 2014 12:54:44 +0200 Subject: [PATCH] af_iucv: avoid path quiesce of severed path in shutdown() 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 Signed-off-by: Frank Blaschka Reported-by: Philipp Hachtmann Signed-off-by: David S. Miller --- net/iucv/af_iucv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index d79f5fb695b8..a089b6b91650 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -1542,7 +1542,8 @@ static int iucv_sock_shutdown(struct socket *sock, int how) 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; -- 2.20.1