diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
index 2e89ec4..7deab7a 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
@@ -698,6 +698,7 @@
 				 <&clkc CLKID_MPLL2>;
 			clock-names = "stmmaceth", "clkin0", "clkin1";
 			phy-mode = "rgmii";
+			snps,pbl = <8>;
 			status = "disabled";
 		};
 	};
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
index 99074695..fffb407 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
@@ -97,7 +97,7 @@ static void dwmac1000_dma_init(void __iomem *ioaddr, int pbl, int fb, int mb,
 	 * so only the bits: 13-8 are programmed with the PBL passed from the
 	 * platform.
 	 */
-	value |= DMA_BUS_MODE_MAXPBL;
+	value &= ~DMA_BUS_MODE_MAXPBL;
 	value &= ~DMA_BUS_MODE_PBL_MASK;
 	value |= (pbl << DMA_BUS_MODE_PBL_SHIFT);