[SCSI] zfcp: verify for correct rport state before scanning for SCSI devs

Prevent a SCSI target scan for a rport which have turned invalid
in the meantime.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 35364f64da7..c55dd2728f9 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -1186,7 +1186,9 @@ static void zfcp_erp_scsi_scan(struct work_struct *work)
                 container_of(work, struct zfcp_erp_add_work, work);
         struct zfcp_unit *unit = p->unit;
         struct fc_rport *rport = unit->port->rport;
-        scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
+
+        if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
+                scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
                          scsilun_to_int((struct scsi_lun *)&unit->fcp_lun), 0);
         atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
         zfcp_unit_put(unit);