From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40248 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751604AbeA2UDC (ORCPT ); Mon, 29 Jan 2018 15:03:02 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yuval Mintz , Ido Schimmel , Jiri Pirko , "David S. Miller" Subject: [PATCH 4.9 53/66] mlxsw: spectrum_router: Dont log an error on missing neighbor Date: Mon, 29 Jan 2018 13:57:17 +0100 Message-Id: <20180129123842.686341375@linuxfoundation.org> In-Reply-To: <20180129123839.842860149@linuxfoundation.org> References: <20180129123839.842860149@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yuval Mintz [ Upstream commit 1ecdaea02ca6bfacf2ecda500dc1af51e9780c42 ] Driver periodically samples all neighbors configured in device in order to update the kernel regarding their state. When finding an entry configured in HW that doesn't show in neigh_lookup() driver logs an error message. This introduces a race when removing multiple neighbors - it's possible that a given entry would still be configured in HW as its removal is still being processed but is already removed from the kernel's neighbor tables. Simply remove the error message and gracefully accept such events. Fixes: c723c735fa6b ("mlxsw: spectrum_router: Periodically update the kernel's neigh table") Fixes: 60f040ca11b9 ("mlxsw: spectrum_router: Periodically dump active IPv6 neighbours") Signed-off-by: Yuval Mintz Reviewed-by: Ido Schimmel Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -765,11 +765,8 @@ static void mlxsw_sp_router_neigh_ent_ip dipn = htonl(dip); dev = mlxsw_sp->rifs[rif]->dev; n = neigh_lookup(&arp_tbl, &dipn, dev); - if (!n) { - netdev_err(dev, "Failed to find matching neighbour for IP=%pI4h\n", - &dip); + if (!n) return; - } netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip); neigh_event_send(n, NULL);