From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:38020 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387767AbeKVFnS (ORCPT ); Thu, 22 Nov 2018 00:43:18 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stephen Mallon , Eric Dumazet , "David S. Miller" Subject: [PATCH 4.19 09/42] tcp: Fix SOF_TIMESTAMPING_RX_HARDWARE to use the latest timestamp during TCP coalescing Date: Wed, 21 Nov 2018 20:05:45 +0100 Message-Id: <20181121183148.369751058@linuxfoundation.org> In-Reply-To: <20181121183147.869199006@linuxfoundation.org> References: <20181121183147.869199006@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stephen Mallon [ Upstream commit cadf9df27e7cf40e390e060a1c71bb86ecde798b ] During tcp coalescing ensure that the skb hardware timestamp refers to the highest sequence number data. Previously only the software timestamp was updated during coalescing. Signed-off-by: Stephen Mallon Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/tcp_input.c | 1 + 1 file changed, 1 insertion(+) --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -4371,6 +4371,7 @@ static bool tcp_try_coalesce(struct sock if (TCP_SKB_CB(from)->has_rxtstamp) { TCP_SKB_CB(to)->has_rxtstamp = true; to->tstamp = from->tstamp; + skb_hwtstamps(to)->hwtstamp = skb_hwtstamps(from)->hwtstamp; } return true;