This is an attempt to fix the weird behavior we currently have on MP JOIN
failures.
In the end I was unable to find a way to address the thing without touching
tcp_check_req(), but this is an attempt to keep the impact for !MPTCP build
null, and the MPTCP overhead as low as possible.

Paolo Abeni (2):
  mptcp: add new sock flag to deal with join subflows
  mptcp: cope better with MP_JOIN failure

 include/linux/tcp.h      |  1 +
 include/net/mptcp.h      | 17 ++++++++++-------
 net/ipv4/tcp_minisocks.c |  2 +-
 net/mptcp/protocol.c     |  7 -------
 net/mptcp/subflow.c      | 19 +++++++++++++------
 5 files changed, 25 insertions(+), 21 deletions(-)

-- 
2.21.1