netdev - [PATCH net-next 2/3] r8169: improve rtl8169_rx

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Date:   Tue, 12 Jan 2021 09:29:45 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...emloft.net>,
        Realtek linux nic maintainers <nic_swsd@...ltek.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next 2/3] r8169: improve rtl8169_rx_csum

Extend the mask to include the checksum failure bits. This allows to
simplify the condition in rtl8169_rx_csum().

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 84f488d1c..b4c080cc6 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -533,6 +533,9 @@ enum rtl_rx_desc_bit {
 	IPFail		= (1 << 16), /* IP checksum failed */
 	UDPFail		= (1 << 15), /* UDP/IP checksum failed */
 	TCPFail		= (1 << 14), /* TCP/IP checksum failed */
+
+#define RxCSFailMask	(IPFail | UDPFail | TCPFail)
+
 	RxVlanTag	= (1 << 16), /* VLAN tag available */
 };
 
@@ -4377,10 +4380,9 @@ static inline int rtl8169_fragmented_frame(u32 status)
 
 static inline void rtl8169_rx_csum(struct sk_buff *skb, u32 opts1)
 {
-	u32 status = opts1 & RxProtoMask;
+	u32 status = opts1 & (RxProtoMask | RxCSFailMask);
 
-	if (((status == RxProtoTCP) && !(opts1 & TCPFail)) ||
-	    ((status == RxProtoUDP) && !(opts1 & UDPFail)))
+	if (status == RxProtoTCP || status == RxProtoUDP)
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
 	else
 		skb_checksum_none_assert(skb);
-- 
2.30.0