net/smc: improve smc_listen_work reason codes
Rework smc_listen_work() to provide improved reason codes when an
SMC connection is declined. This allows better debugging on user side.
This also adds 3 more detailed reason codes in smc_clc.h to indicate
what type of device was not found (ism or rdma or both), or if ism
cannot talk to the peer.
Signed-off-by: Karsten Graul <firstname.lastname@example.org>
Signed-off-by: Ursula Braun <email@example.com>
Signed-off-by: David S. Miller <firstname.lastname@example.org>