mptcp: __mptcp_tcp_fallback() returns a struct sock
Currently __mptcp_tcp_fallback() always return NULL on incoming connections, because MPTCP does not create the additional socket for the first subflow. Since the previous commit no __mptcp_tcp_fallback() caller needs a struct socket, so let __mptcp_tcp_fallback() return the first subflow sock and cope correctly even with incoming connections. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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