net: stmmac: clear reset value of snps, wr_osr_lmt/snps, rd_osr_lmt before writing

[karo-tx-linux.git] / drivers / net / ethernet / stmicro / stmmac / dwmac1000_dma.c

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
index 9907469552169094a2fea15812021dde40b4e8e8..f35385266fbf04d595c65b469b14c5abcd7e565c 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
@@ -43,9 +43,11 @@ static void dwmac1000_dma_axi(void __iomem *ioaddr, struct stmmac_axi *axi)
        if (axi->axi_xit_frm)
                value |= DMA_AXI_LPI_XIT_FRM;
 
+       value &= ~DMA_AXI_WR_OSR_LMT;
        value |= (axi->axi_wr_osr_lmt & DMA_AXI_WR_OSR_LMT_MASK) <<
                 DMA_AXI_WR_OSR_LMT_SHIFT;
 
+       value &= ~DMA_AXI_RD_OSR_LMT;
        value |= (axi->axi_rd_osr_lmt & DMA_AXI_RD_OSR_LMT_MASK) <<
                 DMA_AXI_RD_OSR_LMT_SHIFT;