linux-kernel - [PATCH 5.4 124/144] net: qualcomm: fix QCA7000 checksum handling

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Date:   Mon, 13 Sep 2021 15:15:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Michael Heimpold <michael.heimpold@...tech.com>,
        Stefan Wahren <stefan.wahren@...e.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 124/144] net: qualcomm: fix QCA7000 checksum handling

From: Stefan Wahren <stefan.wahren@...e.com>

[ Upstream commit 429205da6c834447a57279af128bdd56ccd5225e ]

Based on tests the QCA7000 doesn't support checksum offloading. So assume
ip_summed is CHECKSUM_NONE and let the kernel take care of the checksum
handling. This fixes data transfer issues in noisy environments.

Reported-by: Michael Heimpold <michael.heimpold@...tech.com>
Fixes: 291ab06ecf67 ("net: qualcomm: new Ethernet over SPI driver for QCA7000")
Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/qualcomm/qca_spi.c  | 2 +-
 drivers/net/ethernet/qualcomm/qca_uart.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index baac016f3ec0..15591ad5fe4e 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -434,7 +434,7 @@ qcaspi_receive(struct qcaspi *qca)
 				skb_put(qca->rx_skb, retcode);
 				qca->rx_skb->protocol = eth_type_trans(
 					qca->rx_skb, qca->rx_skb->dev);
-				qca->rx_skb->ip_summed = CHECKSUM_UNNECESSARY;
+				skb_checksum_none_assert(qca->rx_skb);
 				netif_rx_ni(qca->rx_skb);
 				qca->rx_skb = netdev_alloc_skb_ip_align(net_dev,
 					net_dev->mtu + VLAN_ETH_HLEN);
diff --git a/drivers/net/ethernet/qualcomm/qca_uart.c b/drivers/net/ethernet/qualcomm/qca_uart.c
index 0981068504fa..ade70f5df496 100644
--- a/drivers/net/ethernet/qualcomm/qca_uart.c
+++ b/drivers/net/ethernet/qualcomm/qca_uart.c
@@ -107,7 +107,7 @@ qca_tty_receive(struct serdev_device *serdev, const unsigned char *data,
 			skb_put(qca->rx_skb, retcode);
 			qca->rx_skb->protocol = eth_type_trans(
 						qca->rx_skb, qca->rx_skb->dev);
-			qca->rx_skb->ip_summed = CHECKSUM_UNNECESSARY;
+			skb_checksum_none_assert(qca->rx_skb);
 			netif_rx_ni(qca->rx_skb);
 			qca->rx_skb = netdev_alloc_skb_ip_align(netdev,
 								netdev->mtu +
-- 
2.30.2