scsi: qla2xxx: Fix stuck session in PLOGI state

On PLOGI complete + RSCN received, driver tries to handle RSCN but failed to
reset the session back to the beginning to restart the login process. Instead
the session was left in the Plogi complete without moving forward.  This patch
will push the session state back to the delete state and restart the
connection.
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_init.c

@@ -414,6 +414,7 @@ void qla24xx_handle_adisc_event(scsi_qla_host_t *vha, struct event_arg *ea)
 		return;
 	} else if (ea->sp->gen1 != ea->fcport->rscn_gen) {
 		qla_rscn_replay(fcport);
+		qlt_schedule_sess_for_deletion(fcport);
 		return;
 	}
 
@@ -538,6 +539,7 @@ static void qla24xx_handle_gnl_done_event(scsi_qla_host_t *vha,
 
 	if (fcport->last_rscn_gen != fcport->rscn_gen) {
 		qla_rscn_replay(fcport);
+		qlt_schedule_sess_for_deletion(fcport);
 		return;
 	} else if (fcport->last_login_gen != fcport->login_gen) {
 		ql_dbg(ql_dbg_disc, vha, 0x20e0,
@@ -1229,6 +1231,7 @@ void qla24xx_handle_gpdb_event(scsi_qla_host_t *vha, struct event_arg *ea)
 		return;
 	} else if (ea->sp->gen1 != fcport->rscn_gen) {
 		qla_rscn_replay(fcport);
+		qlt_schedule_sess_for_deletion(fcport);
 		return;
 	}
 
@@ -1699,8 +1702,6 @@ void qla_rscn_replay(fc_port_t *fcport)
 #else
                qla24xx_post_gpnid_work(fcport->vha, &ea.id);
 #endif
-       } else {
-               qla24xx_post_gnl_work(fcport->vha, fcport);
 	}
 }
 
@@ -1938,7 +1939,7 @@ qla24xx_handle_plogi_done_event(struct scsi_qla_host *vha, struct event_arg *ea)
 	    "%s %8phC DS %d LS %d rc %d login %d|%d rscn %d|%d data %x|%x iop %x|%x\n",
 	    __func__, fcport->port_name, fcport->disc_state,
 	    fcport->fw_login_state, ea->rc, ea->sp->gen2, fcport->login_gen,
-	    ea->sp->gen2, fcport->rscn_gen|ea->sp->gen1,
+	    ea->sp->gen1, fcport->rscn_gen,
 	    ea->data[0], ea->data[1], ea->iop[0], ea->iop[1]);
 
 	if ((fcport->fw_login_state == DSC_LS_PLOGI_PEND) ||
@@ -1960,7 +1961,11 @@ qla24xx_handle_plogi_done_event(struct scsi_qla_host *vha, struct event_arg *ea)
 		set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
 		return;
 	} else if (ea->sp->gen1 != fcport->rscn_gen) {
+		ql_dbg(ql_dbg_disc, vha, 0x20d3,
+		    "%s %8phC RSCN generation changed\n",
+		    __func__, fcport->port_name);
 		qla_rscn_replay(fcport);
+		qlt_schedule_sess_for_deletion(fcport);
 		return;
 	}
 

drivers/scsi/qla2xxx/qla_target.c

@@ -1260,9 +1260,6 @@ void qlt_schedule_sess_for_deletion(struct fc_port *sess)
 		break;
 	}
 
-	if (sess->deleted == QLA_SESS_DELETED)
-		sess->logout_on_delete = 0;
-
 	spin_lock_irqsave(&sess->vha->work_lock, flags);
 	if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 		spin_unlock_irqrestore(&sess->vha->work_lock, flags);
@@ -4080,7 +4077,6 @@ static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
 				 * Session is already logged out, but we need
 				 * to notify initiator, who's not aware of this
 				 */
-				cmd->sess->logout_on_delete = 0;
 				cmd->sess->send_els_logo = 1;
 				ql_dbg(ql_dbg_disc, vha, 0x20f8,
 				    "%s %d %8phC post del sess\n",