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r8169: replace mii_bus member with phy_device member in struct rtl8169_private

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Accessing the phy_device indirectly via the netdevice causes few issues:
- Accessing the phy_device when it's not attached may cause a NPE.
- If we have to access the phy_device when it's not attached we have
  to use mdiobus_get_phy() to get a reference to the phy_device.

Therefore store a phy_device reference in struct rtl8169_private directly.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2019-01-19 22:07:05 +01:00 committed by David S. Miller
parent 58ba566ccb
commit 703732f005
1 changed files with 25 additions and 31 deletions
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56
drivers/net/ethernet/realtek/r8169.c
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@ -639,6 +639,7 @@ struct rtl8169_private {
void __iomem *mmio_addr; /* memory map physical address */
struct pci_dev *pci_dev;
struct net_device *dev;
struct phy_device *phydev;
struct napi_struct napi;
u32 msg_enable;
u16 mac_version;
@ -679,7 +680,6 @@ struct rtl8169_private {
} wk;
unsigned supports_gmii:1;
struct mii_bus *mii_bus;
dma_addr_t counters_phys_addr;
struct rtl8169_counters *counters;
struct rtl8169_tc_offsets tc_offset;
@ -1318,7 +1318,7 @@ static void rtl8169_irq_mask_and_ack(struct rtl8169_private *tp)
static void rtl_link_chg_patch(struct rtl8169_private *tp)
{
struct net_device *dev = tp->dev;
struct phy_device *phydev = dev->phydev;
struct phy_device *phydev = tp->phydev;
if (!netif_running(dev))
return;
@ -3999,17 +3999,17 @@ static void rtl8169_init_phy(struct net_device *dev, struct rtl8169_private *tp)
}
/* We may have called phy_speed_down before */
phy_speed_up(dev->phydev);
phy_speed_up(tp->phydev);
genphy_soft_reset(dev->phydev);
genphy_soft_reset(tp->phydev);
/* It was reported that several chips end up with 10MBit/Half on a
* 1GBit link after resuming from S3. For whatever reason the PHY on
* these chips doesn't properly start a renegotiation when soft-reset.
* Explicitly requesting a renegotiation fixes this.
*/
if (dev->phydev->autoneg == AUTONEG_ENABLE)
phy_restart_aneg(dev->phydev);
if (tp->phydev->autoneg == AUTONEG_ENABLE)
phy_restart_aneg(tp->phydev);
}
static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr)
@ -4054,10 +4054,12 @@ static int rtl_set_mac_address(struct net_device *dev, void *p)
static int rtl8169_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct rtl8169_private *tp = netdev_priv(dev);
if (!netif_running(dev))
return -ENODEV;
return phy_mii_ioctl(dev->phydev, ifr, cmd);
return phy_mii_ioctl(tp->phydev, ifr, cmd);
}
static void rtl_init_mdio_ops(struct rtl8169_private *tp)
@ -4106,15 +4108,10 @@ static void rtl_wol_suspend_quirk(struct rtl8169_private *tp)
static bool rtl_wol_pll_power_down(struct rtl8169_private *tp)
{
struct phy_device *phydev;
if (!__rtl8169_get_wol(tp))
return false;
/* phydev may not be attached to netdevice */
phydev = mdiobus_get_phy(tp->mii_bus, 0);
phy_speed_down(phydev, false);
phy_speed_down(tp->phydev, false);
rtl_wol_suspend_quirk(tp);
return true;
@ -4183,7 +4180,7 @@ static void r8168_pll_power_up(struct rtl8169_private *tp)
break;
}
phy_resume(tp->dev->phydev);
phy_resume(tp->phydev);
/* give MAC/PHY some time to resume */
msleep(20);
}
@ -6415,8 +6412,8 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
goto out;
}
if (status & LinkChg && tp->dev->phydev)
phy_mac_interrupt(tp->dev->phydev);
if (status & LinkChg)
phy_mac_interrupt(tp->phydev);
if (unlikely(status & RxFIFOOver &&
tp->mac_version == RTL_GIGA_MAC_VER_11)) {
@ -6507,12 +6504,12 @@ static void r8169_phylink_handler(struct net_device *ndev)
}
if (net_ratelimit())
phy_print_status(ndev->phydev);
phy_print_status(tp->phydev);
}
static int r8169_phy_connect(struct rtl8169_private *tp)
{
struct phy_device *phydev = mdiobus_get_phy(tp->mii_bus, 0);
struct phy_device *phydev = tp->phydev;
phy_interface_t phy_mode;
int ret;
@ -6539,7 +6536,7 @@ static void rtl8169_down(struct net_device *dev)
{
struct rtl8169_private *tp = netdev_priv(dev);
phy_stop(dev->phydev);
phy_stop(tp->phydev);
napi_disable(&tp->napi);
netif_stop_queue(dev);
@ -6581,7 +6578,7 @@ static int rtl8169_close(struct net_device *dev)
cancel_work_sync(&tp->wk.work);
phy_disconnect(dev->phydev);
phy_disconnect(tp->phydev);
pci_free_irq(pdev, 0, tp);
@ -6658,7 +6655,7 @@ static int rtl_open(struct net_device *dev)
if (!rtl8169_init_counter_offsets(tp))
netif_warn(tp, hw, dev, "counter reset/update failed\n");
phy_start(dev->phydev);
phy_start(tp->phydev);
netif_start_queue(dev);
rtl_unlock_work(tp);
@ -6747,7 +6744,7 @@ static void rtl8169_net_suspend(struct net_device *dev)
if (!netif_running(dev))
return;
phy_stop(dev->phydev);
phy_stop(tp->phydev);
netif_device_detach(dev);
rtl_lock_work(tp);
@ -6782,7 +6779,7 @@ static void __rtl8169_resume(struct net_device *dev)
rtl_pll_power_up(tp);
rtl8169_init_phy(dev, tp);
phy_start(tp->dev->phydev);
phy_start(tp->phydev);
rtl_lock_work(tp);
napi_enable(&tp->napi);
@ -6925,7 +6922,7 @@ static void rtl_remove_one(struct pci_dev *pdev)
netif_napi_del(&tp->napi);
unregister_netdev(dev);
mdiobus_unregister(tp->mii_bus);
mdiobus_unregister(tp->phydev->mdio.bus);
rtl_release_firmware(tp);
@ -7032,7 +7029,6 @@ static int r8169_mdio_write_reg(struct mii_bus *mii_bus, int phyaddr,
static int r8169_mdio_register(struct rtl8169_private *tp)
{
struct pci_dev *pdev = tp->pci_dev;
struct phy_device *phydev;
struct mii_bus *new_bus;
int ret;
@ -7054,16 +7050,14 @@ static int r8169_mdio_register(struct rtl8169_private *tp)
if (ret)
return ret;
phydev = mdiobus_get_phy(new_bus, 0);
if (!phydev) {
tp->phydev = mdiobus_get_phy(new_bus, 0);
if (!tp->phydev) {
mdiobus_unregister(new_bus);
return -ENODEV;
}
/* PHY will be woken up in rtl_open() */
phy_suspend(phydev);
tp->mii_bus = new_bus;
phy_suspend(tp->phydev);
return 0;
}
@ -7397,7 +7391,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
return 0;
err_mdio_unregister:
mdiobus_unregister(tp->mii_bus);
mdiobus_unregister(tp->phydev->mdio.bus);
return rc;
}