net: hns3: fix a phy loopback fail issue

[ Upstream commit f04bbcbf1e38d192e94bbfa126731a52332c40b1 ]

When phy driver does not implement the set_loopback interface,
phy loopback test will return -EOPNOTSUPP, and the loopback test
will fail. So when phy driver does not implement the set_loopback
interface, don't do phy loopback test.

Fixes: c9765a89d142 ("net: hns3: add phy selftest function")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 83f18aa..4321132 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -752,7 +752,8 @@ static int hclge_get_sset_count(struct hnae3_handle *handle, int stringset)
                handle->flags |= HNAE3_SUPPORT_SERDES_SERIAL_LOOPBACK;
                handle->flags |= HNAE3_SUPPORT_SERDES_PARALLEL_LOOPBACK;
 
-               if (hdev->hw.mac.phydev) {
+               if (hdev->hw.mac.phydev && hdev->hw.mac.phydev->drv &&
+                   hdev->hw.mac.phydev->drv->set_loopback) {
                        count += 1;
                        handle->flags |= HNAE3_SUPPORT_PHY_LOOPBACK;
                }