From: françois romieu Date: Tue, 6 Mar 2012 01:14:12 +0000 (+0000) Subject: r8169: runtime resume before shutdown. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2a15cd2ff488a9fdb55e5e34060f499853b27c77;p=linux-beck.git r8169: runtime resume before shutdown. With runtime PM, if the ethernet cable is disconnected, the device is transitioned to D3 state to conserve energy. If the system is shutdown in this state, any register accesses in rtl_shutdown are dropped on the floor. As the device was programmed by .runtime_suspend() to wake on link changes, it is thus brought back up as soon as the link recovers. Resuming every suspended device through the driver core would slow things down and it is not clear how many devices really need it now. Original report and D0 transition patch by Sameer Nanda. Patch has been changed to comply with advices by Rafael J. Wysocki and the PM folks. Reported-by: Sameer Nanda Signed-off-by: Francois Romieu Cc: Rafael J. Wysocki Cc: Hayes Wang Cc: Alan Stern Acked-by: Rafael J. Wysocki Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index 1adf17757cea..bbacb3741ec0 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -6194,6 +6194,9 @@ static void rtl_shutdown(struct pci_dev *pdev) { struct net_device *dev = pci_get_drvdata(pdev); struct rtl8169_private *tp = netdev_priv(dev); + struct device *d = &pdev->dev; + + pm_runtime_get_sync(d); rtl8169_net_suspend(dev); @@ -6215,6 +6218,8 @@ static void rtl_shutdown(struct pci_dev *pdev) pci_wake_from_d3(pdev, true); pci_set_power_state(pdev, PCI_D3hot); } + + pm_runtime_put_noidle(d); } static struct pci_driver rtl8169_pci_driver = {