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r8169: improve runtime pm in general and suspend unused ports

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So far rpm doesn't cover cases like unused ports which are never
brought up. If they are active at probe time they remain in this state.
Included in this patch:

- Let the idle notification check whether we can suspend and let it
  schedule the suspend. This way we don't need to have calls to
  pm_schedule_suspend in different places.

- At the end of rtl_open and rtl_init_one send an idle notification
  to allow suspending if the link is down. If a cable is plugged in
  aneg is finished before the suspend timer expires and the suspend
  request is cancelled.

- Change rtl8169_runtime_suspend to power down the chip if the
  interface is down.

Successfully tested on a RTL8168evl (mac version 34).

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2018-01-08 21:39:13 +01:00 committed by David S. Miller
parent ef4d5fcceb
commit a92a08499b
1 changed files with 12 additions and 8 deletions
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20
drivers/net/ethernet/realtek/r8169.c
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@ -1689,7 +1689,7 @@ static void rtl8169_check_link_status(struct net_device *dev,
} else {
netif_carrier_off(dev);
netif_info(tp, ifdown, dev, "link down\n");
pm_schedule_suspend(&tp->pci_dev->dev, 10000);
pm_runtime_idle(&tp->pci_dev->dev);
}
}
@ -7950,7 +7950,7 @@ static int rtl_open(struct net_device *dev)
rtl_unlock_work(tp);
tp->saved_wolopts = 0;
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_put_sync(&pdev->dev);
rtl8169_check_link_status(dev, tp, ioaddr);
out:
@ -8094,8 +8094,10 @@ static int rtl8169_runtime_suspend(struct device *device)
struct net_device *dev = pci_get_drvdata(pdev);
struct rtl8169_private *tp = netdev_priv(dev);
if (!tp->TxDescArray)
if (!tp->TxDescArray) {
rtl_pll_power_down(tp);
return 0;
}
rtl_lock_work(tp);
tp->saved_wolopts = __rtl8169_get_wol(tp);
@ -8137,9 +8139,11 @@ static int rtl8169_runtime_idle(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct net_device *dev = pci_get_drvdata(pdev);
struct rtl8169_private *tp = netdev_priv(dev);
return tp->TxDescArray ? -EBUSY : 0;
if (!netif_running(dev) || !netif_carrier_ok(dev))
pm_schedule_suspend(device, 10000);
return -EBUSY;
}
static const struct dev_pm_ops rtl8169_pm_ops = {
@ -8687,11 +8691,11 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
rtl8168_driver_start(tp);
}
if (pci_dev_run_wake(pdev))
pm_runtime_put_noidle(&pdev->dev);
netif_carrier_off(dev);
if (pci_dev_run_wake(pdev))
pm_runtime_put_sync(&pdev->dev);
return 0;
}