tree 41b1c42cf87d135bb2a1ce1ea1d043fc53ac0cc4
parent 675195d0be27391d48d8d23c7c62991505168528
author Hannes Reinecke <hare@suse.de> 1506340043 +0200
committer Martin K. Petersen <martin.petersen@oracle.com> 1506389649 -0400

scsi: scsi_transport_fc: Also check for NOTPRESENT in fc_remote_port_add()

During failover there is a small race window between fc_remote_port_add()
and fc_timeout_deleted_rport(); the latter drops the lock after setting the
port to NOTPRESENT, so if fc_remote_port_add() is called right at that time
it will fail to detect the existing rport and happily adding a new
structure, causing rports to get registered twice.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>