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This patch is to let it always do CRC checksum in sctp_gso_segment()
by removing CRC flag from the dev features in gre_gso_segment() for
SCTP over GRE, just as it does in Commit 527beb8ef9 ("udp: support
sctp over udp in skb_udp_tunnel_segment") for SCTP over UDP.
It could set csum/csum_start in GSO CB properly in sctp_gso_segment()
after that commit, so it would do checksum with gso_make_checksum()
in gre_gso_segment(), and Commit 622e32b7d4 ("net: gre: recompute
gre csum for sctp over gre tunnels") can be reverted now.
Note that when need_csum is false, we can still leave CRC checksum
of SCTP to HW by not clearing this CRC flag if it's supported, as
Jakub and Alex noticed.
v1->v2:
- improve the changelog.
- fix "rev xmas tree" in varibles declaration.
v2->v3:
- remove CRC flag from dev features only when need_csum is true.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/00439f24d5f69e2c6fa2beadc681d056c15c258f.1610772251.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
1a2367665a