>From 2c23b6a88a134bd9df0acc998383a34aa1df6583 Mon Sep 17 00:00:00 2001
From: Parthasarathy Bhuvaragan <[email protected]>
Date: Fri, 22 Dec 2017 15:43:23 +0100
Subject: [PATCH] tipc: fix hanging poll() for stream clients
In commit 42b531de17d2f6 ("tipc: Fix missing connection request
handling"), we replaced unconditional wakeup() with condtional
wakeup for clients with flags POLLIN | POLLRDNORM | POLLRDBAND.
This breaks the ABI for applications which do a connect followed
by poll with POLLOUT flag. These applications are not woken when
the connection is ESTABLISHED.
In this commit, we fix it by including the POLLOUT event for
sockets in TIPC_CONNECTING state.
Fixes: 42b531de17d2f6 ("tipc: Fix missing connection request handling")
Reported-by: [email protected]
Signed-off-by: Parthasarathy Bhuvaragan <
[email protected]>
---
net/tipc/socket.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 41127d0b925e..3b4084480377 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -727,11 +727,11 @@ static unsigned int tipc_poll(struct file *file,
struct socket *sock,
switch (sk->sk_state) {
case TIPC_ESTABLISHED:
+ case TIPC_CONNECTING:
if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk))
revents |= POLLOUT;
/* fall thru' */
case TIPC_LISTEN:
- case TIPC_CONNECTING:
if (!skb_queue_empty(&sk->sk_receive_queue))
revents |= POLLIN | POLLRDNORM;
break;
--
2.11.0
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