From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6ADA611C83 for ; Mon, 28 Aug 2023 10:31:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DE3B7C433C7; Mon, 28 Aug 2023 10:31:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1693218687; bh=Q7ev6SjUMvH8r93yzRCZ1Q3kSy1doWQKeMrbok7SB2c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H5YGqb7tNi8GQT+Ujhi1fwTDSpz/SsqevrPtleThf+Ct4+YJq4Y8Sgn4jcAsmWKg7 fEkYTc7psxrIEwN5DwLKDI/i4ewmI7YRcVk2Agj98JjQzvLdTYeXdyw7nZoRuZxdmx 3r7qcGAs/8h3H4ckT8qFrKgGkRvo5tt96tPI5Wgo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Oliver Hartkopp , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.1 046/122] can: isotp: fix support for transmission of SF without flow control Date: Mon, 28 Aug 2023 12:12:41 +0200 Message-ID: <20230828101157.949950089@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230828101156.480754469@linuxfoundation.org> References: <20230828101156.480754469@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Oliver Hartkopp [ Upstream commit 0bfe71159230bab79ee230225ae12ffecbb69f3e ] The original implementation had a very simple handling for single frame transmissions as it just sent the single frame without a timeout handling. With the new echo frame handling the echo frame was also introduced for single frames but the former exception ('simple without timers') has been maintained by accident. This leads to a 1 second timeout when closing the socket and to an -ECOMM error when CAN_ISOTP_WAIT_TX_DONE is selected. As the echo handling is always active (also for single frames) remove the wrong extra condition for single frames. Fixes: 9f39d36530e5 ("can: isotp: add support for transmission without flow control") Signed-off-by: Oliver Hartkopp Link: https://lore.kernel.org/r/20230821144547.6658-2-socketcan@hartkopp.net Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/can/isotp.c | 22 +++++++--------------- 1 file changed, 7 insertions(+), 15 deletions(-) diff --git a/net/can/isotp.c b/net/can/isotp.c index b3c2a49b189cc..8c97f4061ffd7 100644 --- a/net/can/isotp.c +++ b/net/can/isotp.c @@ -175,12 +175,6 @@ static bool isotp_register_rxid(struct isotp_sock *so) return (isotp_bc_flags(so) == 0); } -static bool isotp_register_txecho(struct isotp_sock *so) -{ - /* all modes but SF_BROADCAST register for tx echo skbs */ - return (isotp_bc_flags(so) != CAN_ISOTP_SF_BROADCAST); -} - static enum hrtimer_restart isotp_rx_timer_handler(struct hrtimer *hrtimer) { struct isotp_sock *so = container_of(hrtimer, struct isotp_sock, @@ -1176,7 +1170,7 @@ static int isotp_release(struct socket *sock) lock_sock(sk); /* remove current filters & unregister */ - if (so->bound && isotp_register_txecho(so)) { + if (so->bound) { if (so->ifindex) { struct net_device *dev; @@ -1293,14 +1287,12 @@ static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len) can_rx_register(net, dev, rx_id, SINGLE_MASK(rx_id), isotp_rcv, sk, "isotp", sk); - if (isotp_register_txecho(so)) { - /* no consecutive frame echo skb in flight */ - so->cfecho = 0; + /* no consecutive frame echo skb in flight */ + so->cfecho = 0; - /* register for echo skb's */ - can_rx_register(net, dev, tx_id, SINGLE_MASK(tx_id), - isotp_rcv_echo, sk, "isotpe", sk); - } + /* register for echo skb's */ + can_rx_register(net, dev, tx_id, SINGLE_MASK(tx_id), + isotp_rcv_echo, sk, "isotpe", sk); dev_put(dev); @@ -1521,7 +1513,7 @@ static void isotp_notify(struct isotp_sock *so, unsigned long msg, case NETDEV_UNREGISTER: lock_sock(sk); /* remove current filters & unregister */ - if (so->bound && isotp_register_txecho(so)) { + if (so->bound) { if (isotp_register_rxid(so)) can_rx_unregister(dev_net(dev), dev, so->rxid, SINGLE_MASK(so->rxid), -- 2.40.1