linux-kernel - [PATCH 2.6.22.y] firewire: fw-ohci: ignore failure of pci_set_power

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Message-ID: <tkrat.27649d5116b81d43@s5r6.in-berlin.de>
Date:	Tue, 11 Sep 2007 14:59:17 +0200 (CEST)
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	stable@...nel.org
cc:	linux-kernel@...r.kernel.org, linux1394-devel@...ts.sourceforge.net
Subject: [PATCH 2.6.22.y] firewire: fw-ohci: ignore failure of
 pci_set_power_state (fix suspend regression)

Minor regression since 2.6.22-rc1:  If the experimental firewire-ohci
driver instead of ohci1394 was loaded, iBook G3 and older PowerBooks
refused to suspend.

Same as commit 5511142870046a7bed947d51ec9b320856ee120a plus format
string touch-ups from 8a8cea2734808522f02941ea16125810ee42c9c7,
"firewire: missing newline in printk".  Original patch description:

Fixes (papers over) "Sleep problems with kernels >= 2.6.21 on powerpc",
http://lkml.org/lkml/2007/8/25/155.  The issue is that the FireWire
controller's pci_dev.current_state of iBook G3 and presumably older
PowerBooks is still in PCI_UNKNOWN instead of PCI_D0 when the firewire
driver's .suspend method is called.

Like it was suggested earlier in http://lkml.org/lkml/2006/10/24/13, we
do not fail .suspend anymore if pci_set_power_state failed.

Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---
 drivers/firewire/fw-ohci.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

Index: linux-2.6.22.6/drivers/firewire/fw-ohci.c
===================================================================
--- linux-2.6.22.6.orig/drivers/firewire/fw-ohci.c
+++ linux-2.6.22.6/drivers/firewire/fw-ohci.c
@@ -1934,14 +1934,12 @@ static int pci_suspend(struct pci_dev *p
 	free_irq(pdev->irq, ohci);
 	err = pci_save_state(pdev);
 	if (err) {
-		fw_error("pci_save_state failed with %d", err);
+		fw_error("pci_save_state failed with %d\n", err);
 		return err;
 	}
 	err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
-	if (err) {
-		fw_error("pci_set_power_state failed with %d", err);
-		return err;
-	}
+	if (err)
+		fw_error("pci_set_power_state failed with %d\n", err);

 	return 0;
 }
@@ -1955,7 +1953,7 @@ static int pci_resume(struct pci_dev *pd
 	pci_restore_state(pdev);
 	err = pci_enable_device(pdev);
 	if (err) {
-		fw_error("pci_enable_device failed with %d", err);
+		fw_error("pci_enable_device failed with %d\n", err);
 		return err;
 	}

-- 
Stefan Richter
-=====-=-=== =--= -=-==
http://arcgraph.de/sr/

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