linux-kernel - Re: [PATCH 4/4] reorder suspend/resume code

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Message-ID: <20080518130429.GD21417@yamamaya.is-a-geek.org>
Date:	Sun, 18 May 2008 15:04:29 +0200
From:	Tobias Diedrich <ranma+kernel@...edrich.de>
To:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ayaz Abdulla <aabdulla@...dia.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Stephen Hemminger <shemminger@...ux-foundation.org>
Subject: Re: [PATCH 4/4] reorder suspend/resume code

From: Tobias Diedrich <ranma+kernel@...edrich.de>

Match the suspend/resume code ordering in e100/e1000e more closely.
For example the configuration space should be saved on suspend even for
devices that are not up.

Signed-off-by: Tobias Diedrich <ranma+kernel@...edrich.de>

Index: linux-2.6.26-rc2.forcedwol/drivers/net/forcedeth.c
===================================================================
--- linux-2.6.26-rc2.forcedwol.orig/drivers/net/forcedeth.c	2008-05-18 13:53:10.000000000 +0200
+++ linux-2.6.26-rc2.forcedwol/drivers/net/forcedeth.c	2008-05-18 13:54:04.000000000 +0200
@@ -5792,22 +5792,20 @@
 	u8 __iomem *base = get_hwbase(dev);
 	int i;
 
-	if (!netif_running(dev))
-		goto out;
-
+	if (netif_running(dev)) {
+		// Gross.
+		nv_close(dev);
+	}
 	netif_device_detach(dev);
 
-	// Gross.
-	nv_close(dev);
-
 	/* save non-pci configuration space */
 	for (i = 0;i <= np->register_size/sizeof(u32); i++)
 		np->saved_config_space[i] = readl(base + i*sizeof(u32));
 
 	pci_save_state(pdev);
 	pci_enable_wake(pdev, pci_choose_state(pdev, state), np->wolenabled);
+	pci_disable_device(pdev);
 	pci_set_power_state(pdev, pci_choose_state(pdev, state));
-out:
 	return 0;
 }
 
@@ -5818,22 +5816,20 @@
 	u8 __iomem *base = get_hwbase(dev);
 	int i, rc = 0;
 
-	if (!netif_running(dev))
-		goto out;
-
-	netif_device_attach(dev);
-
 	pci_set_power_state(pdev, PCI_D0);
 	pci_restore_state(pdev);
+	/* ack any pending wake events, disable PME */
 	pci_enable_wake(pdev, PCI_D0, 0);
 
 	/* restore non-pci configuration space */
 	for (i = 0;i <= np->register_size/sizeof(u32); i++)
 		writel(np->saved_config_space[i], base+i*sizeof(u32));
 
-	rc = nv_open(dev);
-	nv_set_multicast(dev);
-out:
+	netif_device_attach(dev);
+	if (netif_running(dev)) {
+		rc = nv_open(dev);
+		nv_set_multicast(dev);
+	}
 	return rc;
 }
 
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