diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index eebfd6976aaa..154cc0c7623d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -762,7 +762,7 @@ static u32 stmmac_usec2riwt(u32 usec, struct stmmac_priv *priv)
 	/* Receive Interrupt Watchdog Timer (riwt) has a resolution of 256
 	 * ticks.
 	 */
-	return (usec * (clk / USEC_PER_SEC)) / 256;
+	return DIV_ROUND_CLOSEST(usec * (clk / USEC_PER_SEC), 256);
 }
 
 static u32 stmmac_riwt2usec(u32 riwt, struct stmmac_priv *priv)
@@ -775,7 +775,7 @@ static u32 stmmac_riwt2usec(u32 riwt, struct stmmac_priv *priv)
 			return 0;
 	}
 
-	return (riwt * 256) / (clk / USEC_PER_SEC);
+	return DIV_ROUND_CLOSEST(riwt * 256, clk / USEC_PER_SEC);
 }
 
 static int __stmmac_get_coalesce(struct net_device *dev,