From 10df432b682f611e20a4250fe2f97c236379b3e9 Mon Sep 17 00:00:00 2001 From: Hayes Wang Date: Fri, 2 Feb 2018 16:43:35 +0800 Subject: [PATCH] r8152: fix wrong checksum status for received IPv4 packets The device could only check the checksum of TCP and UDP packets. Therefore, for the IPv4 packets excluding TCP and UDP, the check of checksum is necessary, even though the IP checksum is correct. Take ICMP for example, The IP checksum may be correct, but the ICMP checksum may be wrong. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller --- drivers/net/usb/r8152.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 0657203ffb917..756de9ea8d2e0 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -1848,11 +1848,9 @@ static u8 r8152_rx_csum(struct r8152 *tp, struct rx_desc *rx_desc) if (opts2 & RD_IPV4_CS) { if (opts3 & IPF) checksum = CHECKSUM_NONE; - else if ((opts2 & RD_UDP_CS) && (opts3 & UDPF)) - checksum = CHECKSUM_NONE; - else if ((opts2 & RD_TCP_CS) && (opts3 & TCPF)) - checksum = CHECKSUM_NONE; - else + else if ((opts2 & RD_UDP_CS) && !(opts3 & UDPF)) + checksum = CHECKSUM_UNNECESSARY; + else if ((opts2 & RD_TCP_CS) && !(opts3 & TCPF)) checksum = CHECKSUM_UNNECESSARY; } else if (opts2 & RD_IPV6_CS) { if ((opts2 & RD_UDP_CS) && !(opts3 & UDPF)) -- 2.39.5