[PATCH 3.5 37/78] PCI/PM: Clear state_saved during suspend

[Luis Henriques]

3.5.7.26 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Rafael J. Wysocki" <rafael.j.wysocki at intel.com>

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)
-- 
1.8.3.2