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List:       linux-kernel
Subject:    Re: swsuspend not working
From:       Éric Brunet <Eric.Brunet () lps ! ens ! fr>
Date:       2004-07-31 18:20:01
Message-ID: 20040731182001.GA6760 () lps ! ens ! fr
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On Tue, Jul 20, 2004 at 03:17:48PM +0200, Pavel Machek wrote:
> > ? Destination Host Unreachable ? and nothing more. The interrupt count of
> > the card is increasing, however. Unloading and reloading ne2k_pci fixes
> > that.
> 
> Teach ne2k_pci to do on suspend what it does on unload, and to do on
> resume what it does on load. Should be easy.

« Should be easy » is easily said. Well.

The following patch to drivers/net/ne2k-pci.c in 2.6.8-rc1 happens to make
my pci ethernet card (Realtek Semiconductor Co., Ltd. RTL-8029(AS))
suspend to S4 and resume properly.

I know nothing on suspend/resume architecture, I know nothing on
programming ethernet card, I know nothing on patching device drivers; I
just looked at other drivers, picked function calls that had nice looking
names and put them together in ne2k_pci.c. Miraculously, it works.

Do you think it could get in ?

Éric Brunet

--- ne2k-pci.c.orig	2004-07-20 22:15:30.000000000 +0200
+++ ne2k-pci.c	2004-07-31 19:48:38.000000000 +0200
@@ -653,12 +653,43 @@
 	pci_set_drvdata(pdev, NULL);
 }
 
+#ifdef CONFIG_PM
+static int ne2k_pci_suspend (struct pci_dev *pdev, u32 state)
+{
+	struct net_device *dev = pci_get_drvdata (pdev);
+
+	netif_device_detach(dev);
+	ne2k_pci_close(dev);
+	ne2k_pci_reset_8390(dev);
+	pci_set_power_state (pdev, state);
+
+	return 0;
+}
+static int ne2k_pci_resume (struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata (pdev);
+
+	pci_set_power_state(pdev, 0);
+	ne2k_pci_reset_8390(dev);
+	ne2k_pci_open(dev);
+	netif_device_attach(dev);
+
+	return 0;
+}
+
+#endif /* CONFIG_PM */
+
 
 static struct pci_driver ne2k_driver = {
 	.name		= DRV_NAME,
 	.probe		= ne2k_pci_init_one,
 	.remove		= __devexit_p(ne2k_pci_remove_one),
 	.id_table	= ne2k_pci_tbl,
+#ifdef CONFIG_PM
+	.suspend	= ne2k_pci_suspend,
+	.resume		= ne2k_pci_resume,
+#endif /* CONFIG_PM */
+
 };
 
 
-
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