[Patch net 02/10] net: hns: All ports can not work when insmod hns ko after rmmod.

[Peng Li]

From: Yonglong Liu <liuyongl...@huawei.com>

There are two test cases:
1. Remove the 4 modules:hns_enet_drv/hns_dsaf/hnae/hns_mdio,
   and install them again, must use "ifconfig down/ifconfig up"
   command pair to bring port to work.

   This patch calls phy_stop function when init phy to fix this bug.

2. Remove the 2 modules:hns_enet_drv/hns_dsaf, and install them again,
   all ports can not use anymore, because of the phy devices register
   failed(phy devices already exists).

   Phy devices are registered when hns_dsaf installed, this patch
   removes them when hns_dsaf removed.

The two cases are sometimes related, fixing the second case also requires
fixing the first case, so fix them together.

Signed-off-by: Yonglong Liu <liuyongl...@huawei.com>
Signed-off-by: Peng Li <lipeng...@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 15 +++++++++++++++
 drivers/net/ethernet/hisilicon/hns/hns_enet.c     |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c 
b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
index 3613e40..a97228c 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
@@ -778,6 +778,17 @@ static int hns_mac_register_phy(struct hns_mac_cb *mac_cb)
        return rc;
 }
 
+static void hns_mac_remove_phydev(struct hns_mac_cb *mac_cb)
+{
+       if (!to_acpi_device_node(mac_cb->fw_port) || !mac_cb->phy_dev)
+               return;
+
+       phy_device_remove(mac_cb->phy_dev);
+       phy_device_free(mac_cb->phy_dev);
+
+       mac_cb->phy_dev = NULL;
+}
+
 #define MAC_MEDIA_TYPE_MAX_LEN         16
 
 static const struct {
@@ -1117,7 +1128,11 @@ void hns_mac_uninit(struct dsaf_device *dsaf_dev)
        int max_port_num = hns_mac_get_max_port_num(dsaf_dev);
 
        for (i = 0; i < max_port_num; i++) {
+               if (!dsaf_dev->mac_cb[i])
+                       continue;
+
                dsaf_dev->misc_op->cpld_reset_led(dsaf_dev->mac_cb[i]);
+               hns_mac_remove_phydev(dsaf_dev->mac_cb[i]);
                dsaf_dev->mac_cb[i] = NULL;
        }
 }
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c 
b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 28e9078..c205a0e 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -1186,6 +1186,9 @@ int hns_nic_init_phy(struct net_device *ndev, struct 
hnae_handle *h)
        if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
                phy_dev->autoneg = false;
 
+       if (h->phy_if == PHY_INTERFACE_MODE_SGMII)
+               phy_stop(phy_dev);
+
        return 0;
 }
 
-- 
1.9.1