scsi: lpfc: Fix NVMe I/O failover to non-optimized path

scsi: lpfc: Fix NVMe I/O failover to non-optimized path

[ Upstream commit b507357f79171fb4fb4e732ca43a1f30bc5aab1d ]

Currently, we hold off unregistering with NVMe transport layer until GID_FT
or ADISC completes upon receipt of RSCN. In the ADISC discovery routine,
for nodes not found in the GID_FT response, the nodes are unregistered from
the SCSI transport but not UNREG_RPI'd. Meaning outstanding WQEs continue
to be outstanding and were not failed back to the OS. If an NVMe device,
this mean there wasn't initial termination of the I/Os so they could be
issued on a different NVMe path.

Fix by unregistering the RPI so that I/O is cancelled.

Link: https://lore.kernel.org/r/20210910233159.115896-8-jsmart2021@gmail.com
Fixes: 0614568361b0 ("scsi: lpfc: Delay unregistering from transport until GIDFT or ADISC completes")
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>