scsi: qla2xxx: Fix stuck login session

Login session was stucked on cable pull. When FW is in the middle PRLI
PENDING + driver is in Initiator mode, driver fails to check back with FW to
see if the PRLI has completed. This patch would re-check with FW again to
make sure PRLI would complete before pushing forward with relogin.
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Link: https://lore.kernel.org/r/20190830222402.23688-5-hmadhani@marvell.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_init.c

@@ -808,6 +808,15 @@ static void qla24xx_handle_gnl_done_event(scsi_qla_host_t *vha,
 			fcport->fw_login_state = current_login_state;
 			fcport->d_id = id;
 			switch (current_login_state) {
+			case DSC_LS_PRLI_PEND:
+				/*
+				 * In the middle of PRLI. Let it finish.
+				 * Allow relogin code to recheck state again
+				 * with GNL. Push disc_state back to DELETED
+				 * so GNL can go out again
+				 */
+				fcport->disc_state = DSC_DELETED;
+				break;
 			case DSC_LS_PRLI_COMP:
 				if ((e->prli_svc_param_word_3[0] & BIT_4) == 0)
 					fcport->port_type = FCT_INITIATOR;
@@ -1474,7 +1483,7 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport)
 	u64 wwn;
 	u16 sec;
 
-	ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x20d8,
+	ql_dbg(ql_dbg_disc, vha, 0x20d8,
 	    "%s %8phC DS %d LS %d P %d fl %x confl %p rscn %d|%d login %d lid %d scan %d\n",
 	    __func__, fcport->port_name, fcport->disc_state,
 	    fcport->fw_login_state, fcport->login_pause, fcport->flags,
@@ -1485,6 +1494,7 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport)
 		return 0;
 
 	if ((fcport->loop_id != FC_NO_LOOP_ID) &&
+	    qla_dual_mode_enabled(vha) &&
 	    ((fcport->fw_login_state == DSC_LS_PLOGI_PEND) ||
 	     (fcport->fw_login_state == DSC_LS_PRLI_PEND)))
 		return 0;
@@ -1674,17 +1684,6 @@ void qla24xx_handle_relogin_event(scsi_qla_host_t *vha,
 	    fcport->last_login_gen, fcport->login_gen,
 	    fcport->flags);
 
-	if ((fcport->fw_login_state == DSC_LS_PLOGI_PEND) ||
-	    (fcport->fw_login_state == DSC_LS_PRLI_PEND))
-		return;
-
-	if (fcport->fw_login_state == DSC_LS_PLOGI_COMP) {
-		if (time_before_eq(jiffies, fcport->plogi_nack_done_deadline)) {
-			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
-			return;
-		}
-	}
-
 	if (fcport->last_rscn_gen != fcport->rscn_gen) {
 		ql_dbg(ql_dbg_disc, vha, 0x20e9, "%s %d %8phC post gnl\n",
 		    __func__, __LINE__, fcport->port_name);