Support the nway_reset() function for ethtool.

Signed-off-by: Hayes Wang <hayesw...@realtek.com>
---
 drivers/net/usb/r8152.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index fdea194..e1810bc 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -3558,11 +3558,33 @@ out:
        return ret;
 }
 
+static int rtl8152_nway_reset(struct net_device *dev)
+{
+       struct r8152 *tp = netdev_priv(dev);
+       int ret;
+
+       ret = usb_autopm_get_interface(tp->intf);
+       if (ret < 0)
+               goto out;
+
+       mutex_lock(&tp->control);
+
+       ret = mii_nway_restart(&tp->mii);
+
+       mutex_unlock(&tp->control);
+
+       usb_autopm_put_interface(tp->intf);
+
+out:
+       return ret;
+}
+
 static struct ethtool_ops ops = {
        .get_drvinfo = rtl8152_get_drvinfo,
        .get_settings = rtl8152_get_settings,
        .set_settings = rtl8152_set_settings,
        .get_link = ethtool_op_get_link,
+       .nway_reset = rtl8152_nway_reset,
        .get_msglevel = rtl8152_get_msglevel,
        .set_msglevel = rtl8152_set_msglevel,
        .get_wol = rtl8152_get_wol,
-- 
1.9.3

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