linux-kernel - [PATCH v2 4/7] PCI/PM: clear state

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Message-ID: <20130204115605.5569.84605.stgit@zurg>
Date:	Mon, 04 Feb 2013 15:56:05 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	e1000-devel@...ts.sourceforge.net, linux-pci@...r.kernel.org,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	linux-kernel@...r.kernel.org
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH v2 4/7] PCI/PM: clear state_saved during suspend

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

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

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org> # add comment
Cc: linux-pci@...r.kernel.org
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.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 dc5bdce..f9aa311 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -628,6 +628,7 @@ 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;
@@ -774,6 +775,7 @@ static int pci_pm_freeze(struct device *dev)
 		return 0;
 	}
 
+	pci_dev->state_saved = false;
 	if (pm->freeze) {
 		int error;
 
@@ -862,6 +864,7 @@ static int pci_pm_poweroff(struct device *dev)
 		goto Fixup;
 	}
 
+	pci_dev->state_saved = false;
 	if (pm->poweroff) {
 		int error;
 
@@ -987,6 +990,7 @@ static int pci_pm_runtime_suspend(struct device *dev)
 	if (!pm || !pm->runtime_suspend)
 		return -ENOSYS;
 
+	pci_dev->state_saved = false;
 	pci_dev->no_d3cold = false;
 	error = pm->runtime_suspend(dev);
 	suspend_report_result(pm->runtime_suspend, error);

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