diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c
index a3853fccdc7b..beb1d98fa741 100644
--- a/drivers/net/ethernet/freescale/fec_ptp.c
+++ b/drivers/net/ethernet/freescale/fec_ptp.c
@@ -129,6 +129,12 @@ static int fec_ptp_enable_pps(struct fec_enet_private *fep, uint enable)
 
 	spin_lock_irqsave(&fep->tmreg_lock, flags);
 
+	if (fep->perout_enable) {
+		spin_unlock_irqrestore(&fep->tmreg_lock, flags);
+		dev_err(&fep->pdev->dev, "PEROUT is running");
+		return -EBUSY;
+	}
+
 	if (fep->pps_enable == enable) {
 		spin_unlock_irqrestore(&fep->tmreg_lock, flags);
 		return 0;
@@ -572,6 +578,12 @@ static int fec_ptp_enable(struct ptp_clock_info *ptp,
 			}
 			spin_lock_irqsave(&fep->tmreg_lock, flags);
 
+			if (fep->pps_enable) {
+				dev_err(&fep->pdev->dev, "PPS is running");
+				ret = -EBUSY;
+				goto unlock;
+			}
+
 			if (fep->perout_enable) {
 				dev_err(&fep->pdev->dev,
 					"PEROUT has been enabled\n");