diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2010-12-08 15:32:14 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-10 11:09:18 -0800 |
| commit | e4fbce740f078bbc925ba5c86648d9c883968479 (patch) | |
| tree | 079b7536f3139ce745a2d4440fd8e73086a5c5d6 | |
| parent | 6934d33556b366d22392a415ca09d720fed6a442 (diff) | |
r8169: Fix runtime power management
I noticed that one of the post-2.6.36 patches broke runtime PM of the
r8169 on my MSI Wind test machine in such a way that the link was not
brought up after reconnecting the network cable.
In the process of debugging the issue I realized that we only should
invoke the runtime PM functions in rtl8169_check_link_status() when
link change is reported and if we do so, the problem goes away.
Moreover, this allows rtl8169_runtime_idle() to be simplified quite
a bit.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/r8169.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index 7d33ef4bcb4..53b13deade9 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -744,26 +744,36 @@ static void rtl8169_xmii_reset_enable(void __iomem *ioaddr) mdio_write(ioaddr, MII_BMCR, val & 0xffff); } -static void rtl8169_check_link_status(struct net_device *dev, +static void __rtl8169_check_link_status(struct net_device *dev, struct rtl8169_private *tp, - void __iomem *ioaddr) + void __iomem *ioaddr, + bool pm) { unsigned long flags; spin_lock_irqsave(&tp->lock, flags); if (tp->link_ok(ioaddr)) { /* This is to cancel a scheduled suspend if there's one. */ - pm_request_resume(&tp->pci_dev->dev); + if (pm) + pm_request_resume(&tp->pci_dev->dev); netif_carrier_on(dev); netif_info(tp, ifup, dev, "link up\n"); } else { netif_carrier_off(dev); netif_info(tp, ifdown, dev, "link down\n"); - pm_schedule_suspend(&tp->pci_dev->dev, 100); + if (pm) + pm_schedule_suspend(&tp->pci_dev->dev, 100); } spin_unlock_irqrestore(&tp->lock, flags); } +static void rtl8169_check_link_status(struct net_device *dev, + struct rtl8169_private *tp, + void __iomem *ioaddr) +{ + __rtl8169_check_link_status(dev, tp, ioaddr, false); +} + #define WAKE_ANY (WAKE_PHY | WAKE_MAGIC | WAKE_UCAST | WAKE_BCAST | WAKE_MCAST) static u32 __rtl8169_get_wol(struct rtl8169_private *tp) @@ -4600,7 +4610,7 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance) } if (status & LinkChg) - rtl8169_check_link_status(dev, tp, ioaddr); + __rtl8169_check_link_status(dev, tp, ioaddr, true); /* We need to see the lastest version of tp->intr_mask to * avoid ignoring an MSI interrupt and having to wait for @@ -4890,11 +4900,7 @@ static int rtl8169_runtime_idle(struct device *device) struct net_device *dev = pci_get_drvdata(pdev); struct rtl8169_private *tp = netdev_priv(dev); - if (!tp->TxDescArray) - return 0; - - rtl8169_check_link_status(dev, tp, tp->mmio_addr); - return -EBUSY; + return tp->TxDescArray ? -EBUSY : 0; } static const struct dev_pm_ops rtl8169_pm_ops = { |