diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac5.c b/drivers/net/ethernet/stmicro/stmmac/dwmac5.c
index d1b8b51bf6ad9b8324ab1f6e028c834c2fef8337..88334c4706f4f24144adc56fe450ff2b4f795932 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac5.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac5.c
@@ -576,6 +576,11 @@ int dwmac5_est_configure(void __iomem *ioaddr, struct stmmac_est *cfg,
 	int i, ret = 0x0;
 	u32 ctrl;
 
+	if (!ptp_rate) {
+		pr_warn("Invalid PTP rate");
+		return -EINVAL;
+	}
+
 	ret |= dwmac5_est_write(ioaddr, BTR_LOW, cfg->btr[0], false);
 	ret |= dwmac5_est_write(ioaddr, BTR_HIGH, cfg->btr[1], false);
 	ret |= dwmac5_est_write(ioaddr, TER, cfg->ter, false);
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
index 86f70ea9a520cd1c9b93db58a3b88c0a2c7eed6f..ba4bcc8afc261edd544c85c693e923df56217749 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
@@ -1491,6 +1491,11 @@ static int dwxgmac3_est_configure(void __iomem *ioaddr, struct stmmac_est *cfg,
 	int i, ret = 0x0;
 	u32 ctrl;
 
+	if (!ptp_rate) {
+		pr_warn("Invalid PTP rate");
+		return -EINVAL;
+	}
+
 	ret |= dwxgmac3_est_write(ioaddr, XGMAC_BTR_LOW, cfg->btr[0], false);
 	ret |= dwxgmac3_est_write(ioaddr, XGMAC_BTR_HIGH, cfg->btr[1], false);
 	ret |= dwxgmac3_est_write(ioaddr, XGMAC_TER, cfg->ter, false);