scsi: qla2xxx: Fix Relogin to prevent modifying scan_state flag

Relogin fails to move forward due to scan_state flag indicating device is
not there. Before relogin process, Session delete process accidently
modified the scan_state flag.

[mkp: typos plus corrected Fixes: sha as reported by sfr]

Fixes: 2dee552102 ("scsi: qla2xxx: Fix login state machine freeze")
Cc: stable@vger.kernel.org
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_init.c

@@ -303,8 +303,13 @@ qla2x00_async_login(struct scsi_qla_host *vha, fc_port_t *fcport,
 	struct srb_iocb *lio;
 	int rval = QLA_FUNCTION_FAILED;
 
-	if (!vha->flags.online)
+	if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT) ||
-		goto done;
+	    fcport->loop_id == FC_NO_LOOP_ID) {
+		ql_log(ql_log_warn, vha, 0xffff,
+		    "%s: %8phC - not sending command.\n",
+		    __func__, fcport->port_name);
+		return rval;
+	}
 
 	sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
 	if (!sp)
@@ -1276,8 +1281,13 @@ int qla24xx_async_gpdb(struct scsi_qla_host *vha, fc_port_t *fcport, u8 opt)
 	struct port_database_24xx *pd;
 	struct qla_hw_data *ha = vha->hw;
 
-	if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT))
+	if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT) ||
+	    fcport->loop_id == FC_NO_LOOP_ID) {
+		ql_log(ql_log_warn, vha, 0xffff,
+		    "%s: %8phC - not sending command.\n",
+		    __func__, fcport->port_name);
 		return rval;
+	}
 
 	fcport->disc_state = DSC_GPDB;
 
@@ -1967,8 +1977,11 @@ qla24xx_handle_plogi_done_event(struct scsi_qla_host *vha, struct event_arg *ea)
 		return;
 	}
 
-	if (fcport->disc_state == DSC_DELETE_PEND)
+	if ((fcport->disc_state == DSC_DELETE_PEND) ||
+	    (fcport->disc_state == DSC_DELETED)) {
+		set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
 		return;
+	}
 
 	if (ea->sp->gen2 != fcport->login_gen) {
 		/* target side must have changed it. */
@@ -6712,8 +6725,10 @@ qla2x00_abort_isp_cleanup(scsi_qla_host_t *vha)
 	}
 
 	/* Clear all async request states across all VPs. */
-	list_for_each_entry(fcport, &vha->vp_fcports, list)
+	list_for_each_entry(fcport, &vha->vp_fcports, list) {
 		fcport->flags &= ~(FCF_LOGIN_NEEDED | FCF_ASYNC_SENT);
+		fcport->scan_state = 0;
+	}
 	spin_lock_irqsave(&ha->vport_slock, flags);
 	list_for_each_entry(vp, &ha->vp_list, list) {
 		atomic_inc(&vp->vref_count);

drivers/scsi/qla2xxx/qla_os.c

@@ -5085,6 +5085,7 @@ void qla24xx_create_new_sess(struct scsi_qla_host *vha, struct qla_work_evt *e)
 	if (fcport) {
 		fcport->id_changed = 1;
 		fcport->scan_state = QLA_FCPORT_FOUND;
+		fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 		memcpy(fcport->node_name, e->u.new_sess.node_name, WWN_SIZE);
 
 		if (pla) {

drivers/scsi/qla2xxx/qla_target.c

@@ -1209,7 +1209,6 @@ static void qla24xx_chk_fcp_state(struct fc_port *sess)
 		sess->logout_on_delete = 0;
 		sess->logo_ack_needed = 0;
 		sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
-		sess->scan_state = 0;
 	}
 }