linux/drivers/net/ethernet/freescale
Fugang Duan 62a02c98ce net: fec: Don't clear IPV6 header checksum field when IP accelerator enable
The commit 96c50caa51 (net: fec: Enable IP header hardware checksum)
enable HW IP header checksum for IPV4 and IPV6, which causes IPV6 TCP/UDP
cannot work. (The issue is reported by Russell King)

For FEC IP header checksum function: Insert IP header checksum. This "IINS"
bit is written by the user. If set, IP accelerator calculates the IP header
checksum and overwrites the IINS corresponding header field with the calculated
value. The checksum field must be cleared by user, otherwise the checksum
always is 0xFFFF.

So the previous patch clear IP header checksum field regardless of IP frame
type.

In fact, IP HW detect the packet as IPV6 type, even if the "IINS" bit is set,
the IP accelerator is not triggered to calculates IPV6 header checksum because
IPV6 frame format don't have checksum.

So this results in the IPV6 frame being corrupted.

The patch just add software detect the current packet type, if it is IPV6
frame, it don't clear IP header checksum field.

Cc: Russell King <linux@arm.linux.org.uk>
Reported-and-tested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-17 21:58:35 -07:00
..
fs_enet fs_enet: use the new fixed PHY helpers 2014-05-22 15:16:43 -04:00
fec_main.c net: fec: Don't clear IPV6 header checksum field when IP accelerator enable 2014-06-17 21:58:35 -07:00
fec_mpc52xx_phy.c net: fec_mpc52xx_phy: remove unnecessary dev_set_drvdata() 2013-08-21 12:27:04 -07:00
fec_mpc52xx.c
fec_mpc52xx.h
fec_ptp.c ptp: drivers: set the number of programmable pins. 2014-03-21 14:21:14 -04:00
fec.h net: fec: Add software TSO support 2014-06-12 11:01:57 -07:00
fsl_pq_mdio.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
gianfar_ethtool.c gianfar: Check if phydev present on ethtool -A 2014-04-24 13:36:16 -04:00
gianfar_ptp.c ptp: drivers: set the number of programmable pins. 2014-03-21 14:21:14 -04:00
gianfar.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
gianfar.h gianfar: Use Single-Queue polling for "fsl,etsec2" 2014-03-10 13:17:22 -04:00
Kconfig net/fsl: xgmac_mdio is dependent on OF_MDIO 2014-06-11 15:50:59 -07:00
Makefile gianfar: Remove sysfs stubs for FIFOCFG and stashing 2014-02-18 15:03:02 -05:00
ucc_geth_ethtool.c net: get rid of SET_ETHTOOL_OPS 2014-05-13 17:43:20 -04:00
ucc_geth.c ucc_geth: use the new fixed PHY helpers 2014-05-22 15:16:44 -04:00
ucc_geth.h
xgmac_mdio.c net/fsl: Make xgmac_mdio read error message useful 2014-06-11 15:50:59 -07:00