Commit 7ca2cbe4 authored Jan 09, 2020 by Subash Abhinov Kasiviswanathan

net: qualcomm: rmnet: Do not zero out transport checksum



Hardware does not use the value populated in the transport checksum
field for checksum computation in MAPv5 format if checksum required
bit is set. The partial checksum can be left as is in these cases.

Explicitly marking the field as 0 could potentially cause incorrect
verdicts in hardware in translation scenarios for UDPv4.

CRs-fixed: 2594257
Change-Id: I8d9e38e6af0df344ceebd630a895b1d7f467b1db
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>

parent 13667470

drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c

+1 −2

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/* Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
		/* Copyright (c) 2013-2020, The Linux Foundation. All rights reserved.
		*
		* RMNET Data MAP protocol
		*
		@@ -535,7 +535,6 @@ void rmnet_map_v5_checksum_uplink_packet(struct sk_buff *skb,

		check = rmnet_map_get_csum_field(proto, trans);
		if (check) {
		*check = 0;
		skb->ip_summed = CHECKSUM_NONE;
		/* Ask for checksum offloading */
		ul_header->csum_valid_required = 1;