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5d928ff486
linux/net/dsa
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Vladimir Oltean 5d928ff486 net: dsa: create a helper for locating EtherType DSA headers on RX 
It seems that protocol tagging driver writers are always surprised about
the formula they use to reach their EtherType header on RX, which
becomes apparent from the fact that there are comments in multiple
drivers that mention the same information.

Create a helper that returns a void pointer to skb->data - 2, as well as
centralize the explanation why that is the case.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-11 14:44:58 +01:00
..
dsa2.c devlink: Set device as early as possible 2021-08-09 10:21:40 +01:00
dsa_priv.h net: dsa: create a helper for locating EtherType DSA headers on RX 2021-08-11 14:44:58 +01:00
dsa.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00
Kconfig net: dsa: tag_sja1105: optionally build as module when switch driver is module if PTP is enabled 2021-08-05 13:30:14 +01:00
Makefile net: dsa: build tag_8021q.c as part of DSA core 2021-07-20 06:36:42 -07:00
master.c dev_ioctl: split out ndo_eth_ioctl 2021-07-27 20:11:45 +01:00
port.c net: dsa: avoid fast ageing twice when port leaves a bridge 2021-08-09 09:57:53 +01:00
slave.c net: dsa: don't fast age standalone ports 2021-08-08 12:52:53 +01:00
switch.c net: dsa: tag_8021q: add proper cross-chip notifier support 2021-07-20 06:36:42 -07:00
tag_8021q.c net: dsa: sja1105: add bridge TX data plane offload based on tag_8021q 2021-07-26 22:35:22 +01:00
tag_ar9331.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00
tag_brcm.c net: dsa: create a helper for locating EtherType DSA headers on RX 2021-08-11 14:44:58 +01:00
tag_dsa.c net: dsa: create a helper for locating EtherType DSA headers on RX 2021-08-11 14:44:58 +01:00
tag_gswip.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00
tag_hellcreek.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00
tag_ksz.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00
tag_lan9303.c net: dsa: create a helper for locating EtherType DSA headers on RX 2021-08-11 14:44:58 +01:00
tag_mtk.c net: dsa: create a helper for locating EtherType DSA headers on RX 2021-08-11 14:44:58 +01:00
tag_ocelot_8021q.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00
tag_ocelot.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00
tag_qca.c net: dsa: create a helper for locating EtherType DSA headers on RX 2021-08-11 14:44:58 +01:00
tag_rtl4_a.c net: dsa: create a helper for locating EtherType DSA headers on RX 2021-08-11 14:44:58 +01:00
tag_sja1105.c net: dsa: create a helper for locating EtherType DSA headers on RX 2021-08-11 14:44:58 +01:00
tag_trailer.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00
tag_xrs700x.c net: dsa: remove the struct packet_type argument from dsa_device_ops::rcv() 2021-08-02 15:13:15 +01:00