shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-10 21:07:02 +09:00
Code Issues Packages Projects Releases Wiki Activity

8139cp: fix checksum broken

Browse Source 
[ Upstream commit 24b7ea9f6c ]

I am not family with RealTek RTL-8139C+ series 10/100 PCI Ethernet driver.
I try to guess the meaning of RxProtoIP and IPFail.
RxProtoIP stands for received IPv4 packet that upper protocol is not tcp and udp.
!(status & IPFail) is true means that driver correctly to check checksum in IPv4 header.

If these are right, driver will set ip_summed with CHECKSUM_UNNECESSARY for other
upper protocol, e.g. sctp, igmp protocol. This will cause protocol stack ignores
checksum check for packets with invalid checksum.

This patch is only compile-test.

Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Shan Wei
2010-11-17 11:55:08 -08:00
committed by Greg Kroah-Hartman
parent 2efb9908d6
commit ed42d59528
1 changed files with 4 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/8139cp.c
View File

@@ -490,13 +490,11 @@ static inline unsigned int cp_rx_csum_ok (u32 status)
{
unsigned int protocol = (status >> 16) & 0x3;
if (likely((protocol == RxProtoTCP) && (!(status & TCPFail))))
if (((protocol == RxProtoTCP) && !(status & TCPFail)) ||
((protocol == RxProtoUDP) && !(status & UDPFail)))
return 1;
else if ((protocol == RxProtoUDP) && (!(status & UDPFail)))
return 1;
else if ((protocol == RxProtoIP) && (!(status & IPFail)))
return 1;
return 0;
else
return 0;
}
static int cp_rx_poll(struct napi_struct *napi, int budget)