mptcp: do not set unconditionally csum_reqd on incoming opt

Should be set only if the ingress packets present it, otherwise
we can confuse csum validation.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2021-08-26 17:44:50 -07:00 • committed by David S. Miller
commit 8d548ea1dd