不插网线终端缓慢的问题解决办法

使用SmartARM3250 V1.00版源码，会出现不插入网线，终端会很缓慢的BUG，可以修改drivers/net/lpc32xx_mii.c文件的下面两个函数解决，将两个函数中的变量的lps的值改为5即可：

/*
 * MAC<--->PHY support functions
 */
static int lpc32xx_mdio_read(struct mii_bus *bus, int phy_id, int phyreg)
{
    struct netdata_local *pldat = bus->priv;
    int lps;
    u32 tmp;

    __raw_writel(((phy_id << 8) | phyreg), ENET_MADR(pldat->net_base));
    __raw_writel(MCMD_READ, ENET_MCMD(pldat->net_base));

    /* Wait for unbusy status */
    lps = 50;   //改为5即可
    tmp = __raw_readl(ENET_MIND(pldat->net_base));
    while ((lps > 0) && (tmp & (MIND_BUSY | MIND_MII_LINK_FAIL)))
    {
        msleep(1);
        tmp = __raw_readl(ENET_MIND(pldat->net_base));
        lps--;
    }
    lps = (int) __raw_readl(ENET_MRDD(pldat->net_base));
    __raw_writel(0, ENET_MCMD(pldat->net_base));

    return lps;
}

static int lpc32xx_mdio_write(struct mii_bus *bus, int phy_id, int phyreg,
            u16 phydata)
{
    struct netdata_local *pldat = bus->priv;
    int lps;
    u32 tmp;

    __raw_writel(((phy_id << 8) | phyreg), ENET_MADR(pldat->net_base));
    __raw_writel(phydata, ENET_MWTD(pldat->net_base));

    /* Wait for completion */
    lps = 50;   //改为5即可
    tmp = __raw_readl(ENET_MIND(pldat->net_base));
    while ((lps > 0) && (tmp & MIND_BUSY))
    {
        msleep(1);
        tmp = __raw_readl(ENET_MIND(pldat->net_base));
        lps--;
    }

    return 0;
}