[PATCH 4.9 20/63] net: hns: All ports can not work when insmod hns ko after rmmod.

From: Greg Kroah-Hartman
Date: Fri Jan 11 2019 - 09:28:15 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

[ Upstream commit 308c6cafde0147616da45e3a928adae55c428deb ]

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 <liuyonglong@xxxxxxxxxx>
Signed-off-by: Peng Li <lipeng321@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 ec8c738af726..b6429be2b8bd 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
@@ -724,6 +724,17 @@ static void hns_mac_register_phy(struct hns_mac_cb *mac_cb)
mac_cb->mac_id, addr);
}

+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 {
@@ -1030,7 +1041,11 @@ 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 92ed6534ceae..12d90c04931b 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -1079,6 +1079,9 @@ 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;
}

--
2.19.1