diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
index 1fcc91be7589..71dac8c1a3ca 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.c
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
@@ -76,7 +76,7 @@ static int stmmac_dwmac1_quirks(struct stmmac_priv *priv)
 		/* GMAC older than 3.50 has no extended descriptors */
 		if (priv->synopsys_id >= DWMAC_CORE_3_50) {
 			dev_info(priv->device, "Enabled extended descriptors\n");
-			priv->extend_desc = 1;
+			priv->extend_desc = true;
 		} else {
 			dev_warn(priv->device, "Extended descriptors not supported\n");
 		}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index 51c96a738151..57ded8e5177f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -302,9 +302,13 @@ struct stmmac_priv {
 	bool eee_active;
 	bool eee_sw_timer_en;
 	bool legacy_serdes_is_powered;
+	/* descriptor format:
+	 *  when clear: struct dma_desc or for tx TBS struct dma_edesc
+	 *  when set, struct dma_extended_desc
+	 */
+	bool extend_desc;
 	unsigned int mode;
 	unsigned int chain_mode;
-	int extend_desc;
 	struct kernel_hwtstamp_config tstamp_config;
 	struct ptp_clock *ptp_clock;
 	struct ptp_clock_info ptp_clock_ops;