From patchwork Sun Apr 5 18:40:04 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 25615 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by ozlabs.org (Postfix) with ESMTP id 692F0DDE00 for ; Mon, 6 Apr 2009 04:40:28 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752116AbZDESkJ (ORCPT ); Sun, 5 Apr 2009 14:40:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752069AbZDESkI (ORCPT ); Sun, 5 Apr 2009 14:40:08 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:41085 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751966AbZDESkG (ORCPT ); Sun, 5 Apr 2009 14:40:06 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by ogre.sisk.pl (Postfix) with ESMTP id 8F373130F2B; Sun, 5 Apr 2009 17:55:56 +0200 (CEST) Received: from ogre.sisk.pl ([127.0.0.1]) by localhost (ogre.sisk.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 04903-03; Sun, 5 Apr 2009 17:55:49 +0200 (CEST) Received: from tosh.localnet (220-bem-13.acn.waw.pl [82.210.184.220]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ogre.sisk.pl (Postfix) with ESMTP id 97AA0129EB0; Sun, 5 Apr 2009 17:55:49 +0200 (CEST) From: "Rafael J. Wysocki" To: Francois Romieu Subject: [PATCH] NET/r8169: Rework suspend and resume Date: Sun, 5 Apr 2009 20:40:04 +0200 User-Agent: KMail/1.11.2 (Linux/2.6.29-rjw; KDE/4.2.2; x86_64; ; ) Cc: NetDev , LKML , pm list MIME-Version: 1.0 Content-Disposition: inline Message-Id: <200904052040.04752.rjw@sisk.pl> X-Virus-Scanned: amavisd-new at ogre.sisk.pl using MkS_Vir for Linux Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Rafael J. Wysocki The recent changes of the PCI PM core allow us to simplify the suspend and resume handling in a number of device drivers, since they don't need to carry out the general PCI PM operations, such as changing the power state of the device, during suspend and resume any more. Simplify the suspend and resume callbacks of r8169 using the observation that the PCI PM core can take care of some operations carried out by the driver. Additionally, make the shutdown callback of r8169 only put the device into a low power state if the system is going to be powered off (kexec is known to have problems with network adapters that are put into low power states on shutdown). This patch has been tested on MSI Wind U100. Signed-off-by: Rafael J. Wysocki --- drivers/net/r8169.c | 61 +++++++++++++++++++++++++++++++++------------------- 1 file changed, 39 insertions(+), 22 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-2.6/drivers/net/r8169.c =================================================================== --- linux-2.6.orig/drivers/net/r8169.c +++ linux-2.6/drivers/net/r8169.c @@ -3791,16 +3791,13 @@ static struct net_device_stats *rtl8169_ return &dev->stats; } -#ifdef CONFIG_PM - -static int rtl8169_suspend(struct pci_dev *pdev, pm_message_t state) +static void rtl8169_net_suspend(struct net_device *dev) { - struct net_device *dev = pci_get_drvdata(pdev); struct rtl8169_private *tp = netdev_priv(dev); void __iomem *ioaddr = tp->mmio_addr; if (!netif_running(dev)) - goto out_pci_suspend; + return; netif_device_detach(dev); netif_stop_queue(dev); @@ -3812,24 +3809,25 @@ static int rtl8169_suspend(struct pci_de rtl8169_rx_missed(dev, ioaddr); spin_unlock_irq(&tp->lock); +} -out_pci_suspend: - pci_save_state(pdev); - pci_enable_wake(pdev, pci_choose_state(pdev, state), - (tp->features & RTL_FEATURE_WOL) ? 1 : 0); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); +#ifdef CONFIG_PM + +static int rtl8169_suspend(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct net_device *dev = pci_get_drvdata(pdev); + + rtl8169_net_suspend(dev); return 0; } -static int rtl8169_resume(struct pci_dev *pdev) +static int rtl8169_resume(struct device *device) { + struct pci_dev *pdev = to_pci_dev(device); struct net_device *dev = pci_get_drvdata(pdev); - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - pci_enable_wake(pdev, PCI_D0, 0); - if (!netif_running(dev)) goto out; @@ -3840,23 +3838,42 @@ out: return 0; } +static struct dev_pm_ops rtl8169_pm_ops = { + .suspend = rtl8169_suspend, + .resume = rtl8169_resume, + .freeze = rtl8169_suspend, + .thaw = rtl8169_resume, + .poweroff = rtl8169_suspend, + .restore = rtl8169_resume, +}; + +#define RTL8169_PM_OPS (&rtl8169_pm_ops) + +#else /* !CONFIG_PM */ + +#define RTL8169_PM_OPS NULL + +#endif /* !CONFIG_PM */ + static void rtl_shutdown(struct pci_dev *pdev) { - rtl8169_suspend(pdev, PMSG_SUSPEND); -} + struct net_device *dev = pci_get_drvdata(pdev); -#endif /* CONFIG_PM */ + rtl8169_net_suspend(dev); + + if (system_state == SYSTEM_POWER_OFF) { + pci_wake_from_d3(pdev, true); + pci_set_power_state(pdev, PCI_D3hot); + } +} static struct pci_driver rtl8169_pci_driver = { .name = MODULENAME, .id_table = rtl8169_pci_tbl, .probe = rtl8169_init_one, .remove = __devexit_p(rtl8169_remove_one), -#ifdef CONFIG_PM - .suspend = rtl8169_suspend, - .resume = rtl8169_resume, .shutdown = rtl_shutdown, -#endif + .driver.pm = RTL8169_PM_OPS, }; static int __init rtl8169_init_module(void)