[3.5.y.z extended stable] Patch "PCI/PM: Clear state_saved during suspend" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Tue Nov 19 13:17:36 UTC 2013

This is a note to let you know that I have just added a patch titled

    PCI/PM: Clear state_saved during suspend

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



>From 27e7ff021b7b13f6d37a9d2aae1496e6ada35f20 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki at intel.com>
Date: Mon, 4 Feb 2013 15:56:05 +0400
Subject: PCI/PM: Clear state_saved during suspend

commit 82fee4d67ab86d6fe5eb0f9a9e988ca9d654d765 upstream.

This patch clears pci_dev->state_saved at the beginning of suspending.
PCI config state may be saved long before that.  Some drivers call
pci_save_state() from the ->probe() callback to get snapshot of sane
configuration space to use in the ->slot_reset() callback.

[wangyj: adjust context]
Signed-off-by: Konstantin Khlebnikov <khlebnikov at openvz.org> # add comment
Signed-off-by: Bjorn Helgaas <bhelgaas at google.com>
Signed-off-by: Yijing Wang <wangyijing at huawei.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/pci/pci-driver.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 3389387..920d701 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -686,6 +686,7 @@ static int pci_pm_suspend(struct device *dev)
 		goto Fixup;

+	pci_dev->state_saved = false;
 	if (pm->suspend) {
 		pci_power_t prev = pci_dev->current_state;
 		int error;
@@ -832,6 +833,7 @@ static int pci_pm_freeze(struct device *dev)
 		return 0;

+	pci_dev->state_saved = false;
 	if (pm->freeze) {
 		int error;

@@ -920,6 +922,7 @@ static int pci_pm_poweroff(struct device *dev)
 		goto Fixup;

+	pci_dev->state_saved = false;
 	if (pm->poweroff) {
 		int error;

@@ -1038,6 +1041,7 @@ static int pci_pm_runtime_suspend(struct device *dev)
 	if (!pm || !pm->runtime_suspend)
 		return -ENOSYS;

+	pci_dev->state_saved = false;
 	error = pm->runtime_suspend(dev);
 	suspend_report_result(pm->runtime_suspend, error);
 	if (error)

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