net: stmmac: dwmac_lib: remove unnecessary checks in dwmac_dma_reset()

it will check the return value of dwmac_dma_reset() in the
stmmac_init_dma_engine() function and report an error if the
return value is not zero. so don't need check here.

Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
index 688d36095333c200e18fee4e054e66f8b2dd8f3e..cb87d31a99dfb6d990f752fa74f0100116f989b2 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
@@ -16,19 +16,14 @@
 int dwmac_dma_reset(void __iomem *ioaddr)
 {
        u32 value = readl(ioaddr + DMA_BUS_MODE);
-       int err;
 
        /* DMA SW reset */
        value |= DMA_BUS_MODE_SFT_RESET;
        writel(value, ioaddr + DMA_BUS_MODE);
 
-       err = readl_poll_timeout(ioaddr + DMA_BUS_MODE, value,
+       return readl_poll_timeout(ioaddr + DMA_BUS_MODE, value,
                                 !(value & DMA_BUS_MODE_SFT_RESET),
                                 10000, 100000);
-       if (err)
-               return -EBUSY;
-
-       return 0;
 }
 
 /* CSR1 enables the transmit DMA to check for new descriptor */