diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.h b/drivers/net/ethernet/qualcomm/emac/emac-mac.h
index 5028fb4bec2ba..4beedb8faa1ef 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-mac.h
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.h
@@ -114,8 +114,9 @@ struct emac_tpd {
 #define TPD_INSTC_SET(tpd, val)		BITS_SET((tpd)->word[3], 17, 17, val)
 /* High-14bit Buffer Address, So, the 64b-bit address is
  * {DESC_CTRL_11_TX_DATA_HIADDR[17:0],(register) BUFFER_ADDR_H, BUFFER_ADDR_L}
+ * Extend TPD_BUFFER_ADDR_H to [31, 18], because we never enable timestamping.
  */
-#define TPD_BUFFER_ADDR_H_SET(tpd, val)	BITS_SET((tpd)->word[3], 18, 30, val)
+#define TPD_BUFFER_ADDR_H_SET(tpd, val)	BITS_SET((tpd)->word[3], 18, 31, val)
 /* Format D. Word offset from the 1st byte of this packet to start to calculate
  * the custom checksum.
  */
diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c
index 38c924bdd32e4..13235baf47663 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac.c
@@ -615,8 +615,11 @@ static int emac_probe(struct platform_device *pdev)
 	u32 reg;
 	int ret;
 
-	/* The TPD buffer address is limited to 45 bits. */
-	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(45));
+	/* The TPD buffer address is limited to:
+	 * 1. PTP:	45bits. (Driver doesn't support yet.)
+	 * 2. NON-PTP:	46bits.
+	 */
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(46));
 	if (ret) {
 		dev_err(&pdev->dev, "could not set DMA mask\n");
 		return ret;