diff --git a/drivers/staging/mt7621-eth/mtk_eth_soc.c b/drivers/staging/mt7621-eth/mtk_eth_soc.c
index 363d3c978e02..21a76a8ccc26 100644
--- a/drivers/staging/mt7621-eth/mtk_eth_soc.c
+++ b/drivers/staging/mt7621-eth/mtk_eth_soc.c
@@ -1689,6 +1689,8 @@ static int mtk_open(struct net_device *dev)
 	struct mtk_mac *mac = netdev_priv(dev);
 	struct mtk_eth *eth = mac->hw;
 
+	dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
+
 	if (!atomic_read(&eth->dma_refcnt)) {
 		int err = mtk_start_dma(eth);
 
@@ -2062,9 +2064,6 @@ static int mtk_probe(struct platform_device *pdev)
 	struct clk *sysclk;
 	int err;
 
-	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
-	pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
-
 	device_reset(&pdev->dev);
 
 	match = of_match_device(of_mtk_match, &pdev->dev);