summaryrefslogtreecommitdiff
path: root/include/linux/dsa
diff options
context:
space:
mode:
authorVladimir Oltean <vladimir.oltean@nxp.com>2020-03-24 11:45:34 +0200
committerDavid S. Miller <davem@davemloft.net>2020-03-24 16:19:01 -0700
commite80f40cbe4dd51371818e967d40da8fe305db5e4 (patch)
tree5872b1405182b8c0df709455dda06a2c115c7b97 /include/linux/dsa
parent961d0e5b32946703125964f9f5b6321d60f4d706 (diff)
net: dsa: tag_8021q: replace dsa_8021q_remove_header with __skb_vlan_pop
Not only did this wheel did not need reinventing, but there is also an issue with it: It doesn't remove the VLAN header in a way that preserves the L2 payload checksum when that is being provided by the DSA master hw. It should recalculate checksum both for the push, before removing the header, and for the pull afterwards. But the current implementation is quite dizzying, with pulls followed immediately afterwards by pushes, the memmove is done before the push, etc. This makes a DSA master with RX checksumming offload to print stack traces with the infamous 'hw csum failure' message. So remove the dsa_8021q_remove_header function and replace it with something that actually works with inet checksumming. Fixes: d461933638ae ("net: dsa: tag_8021q: Create helper function for removing VLAN header") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/dsa')
-rw-r--r--include/linux/dsa/8021q.h7
1 files changed, 0 insertions, 7 deletions
diff --git a/include/linux/dsa/8021q.h b/include/linux/dsa/8021q.h
index 0aa803c451a3..c620d9139c28 100644
--- a/include/linux/dsa/8021q.h
+++ b/include/linux/dsa/8021q.h
@@ -28,8 +28,6 @@ int dsa_8021q_rx_switch_id(u16 vid);
int dsa_8021q_rx_source_port(u16 vid);
-struct sk_buff *dsa_8021q_remove_header(struct sk_buff *skb);
-
#else
int dsa_port_setup_8021q_tagging(struct dsa_switch *ds, int index,
@@ -64,11 +62,6 @@ int dsa_8021q_rx_source_port(u16 vid)
return 0;
}
-struct sk_buff *dsa_8021q_remove_header(struct sk_buff *skb)
-{
- return NULL;
-}
-
#endif /* IS_ENABLED(CONFIG_NET_DSA_TAG_8021Q) */
#endif /* _NET_DSA_8021Q_H */