From: Hayes Wang Date: Fri, 2 Feb 2018 08:43:35 +0000 (+0800) Subject: r8152: fix wrong checksum status for received IPv4 packets X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ea6499e160a74ea813e53e7bef2ccb22df1e4929;p=linux.git 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 --- 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))