From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Samuel Ortiz Subject: [ 08/74] NFC: llcp: Fix non blocking sockets connections Date: Mon, 26 Aug 2013 18:08:06 -0700 Message-Id: <20130827010426.259043153@linuxfoundation.org> In-Reply-To: <20130827010424.535365435@linuxfoundation.org> References: <20130827010424.535365435@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Samuel Ortiz commit b4011239a08e7e6c2c6e970dfa9e8ecb73139261 upstream. Without the new LLCP_CONNECTING state, non blocking sockets will be woken up with a POLLHUP right after calling connect() because their state is stuck at LLCP_CLOSED. That prevents userspace from implementing any proper non blocking socket based NFC p2p client. Signed-off-by: Samuel Ortiz Signed-off-by: Greg Kroah-Hartman --- net/nfc/llcp.h | 1 + net/nfc/llcp_sock.c | 8 +++++--- 2 files changed, 6 insertions(+), 3 deletions(-) --- a/net/nfc/llcp.h +++ b/net/nfc/llcp.h @@ -19,6 +19,7 @@ enum llcp_state { LLCP_CONNECTED = 1, /* wait_for_packet() wants that */ + LLCP_CONNECTING, LLCP_CLOSED, LLCP_BOUND, LLCP_LISTEN, --- a/net/nfc/llcp_sock.c +++ b/net/nfc/llcp_sock.c @@ -571,7 +571,7 @@ static unsigned int llcp_sock_poll(struc if (sk->sk_shutdown == SHUTDOWN_MASK) mask |= POLLHUP; - if (sock_writeable(sk)) + if (sock_writeable(sk) && sk->sk_state == LLCP_CONNECTED) mask |= POLLOUT | POLLWRNORM | POLLWRBAND; else set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); @@ -722,14 +722,16 @@ static int llcp_sock_connect(struct sock if (ret) goto sock_unlink; + sk->sk_state = LLCP_CONNECTING; + ret = sock_wait_state(sk, LLCP_CONNECTED, sock_sndtimeo(sk, flags & O_NONBLOCK)); - if (ret) + if (ret && ret != -EINPROGRESS) goto sock_unlink; release_sock(sk); - return 0; + return ret; sock_unlink: nfc_llcp_put_ssap(local, llcp_sock->ssap);