linux-kernel - [PATCH] Net / e100: Fix suspend of devices that cannot be power managed

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Message-Id: <200906142146.47639.rjw@sisk.pl>
Date:	Sun, 14 Jun 2009 21:46:46 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"Jeffrey Kirsher" <jeffrey.t.kirsher@...el.com>
Cc:	andi@...as.de, akpm@...ux-foundation.org,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Net / e100: Fix suspend of devices that cannot be power managed

From: Rafael J. Wysocki <rjw@...k.pl>

If the adapter is not power-manageable using either ACPI, or the
native PCI PM interface, __e100_power_off() returns error code, which
causes every attempt to suspend to fail, although it should return 0
in such a case.  Fix this problem by ignoring the return value of
pci_set_power_state() in __e100_power_off().

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
Acked-by: Andreas Mohr <andi@...as.de>
---
 drivers/net/e100.c |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

Index: linux-2.6/drivers/net/e100.c
===================================================================
--- linux-2.6.orig/drivers/net/e100.c
+++ linux-2.6/drivers/net/e100.c
@@ -2759,12 +2759,13 @@ static void __e100_shutdown(struct pci_d
 
 static int __e100_power_off(struct pci_dev *pdev, bool wake)
 {
-	if (wake) {
+	if (wake)
 		return pci_prepare_to_sleep(pdev);
-	} else {
-		pci_wake_from_d3(pdev, false);
-		return pci_set_power_state(pdev, PCI_D3hot);
-	}
+
+	pci_wake_from_d3(pdev, false);
+	pci_set_power_state(pdev, PCI_D3hot);
+
+	return 0;
 }
 
 #ifdef CONFIG_PM
--
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