[PATCH] PCI / PM: Add dev_dbg() to print device suspend power states

[Rafael J. Wysocki]

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

It sometimes is useful to know what power states the kernel thinks
it puts PCI devices into during system suspend, so add a dev_dbg()
statement for that.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
 drivers/pci/pci-driver.c |    3 +++
 1 file changed, 3 insertions(+)

Index: linux-pm/drivers/pci/pci-driver.c
===================================================================
--- linux-pm.orig/drivers/pci/pci-driver.c
+++ linux-pm/drivers/pci/pci-driver.c
@@ -798,6 +798,9 @@ static int pci_pm_suspend_noirq(struct d
 			pci_prepare_to_sleep(pci_dev);
 	}
 
+	dev_dbg(dev, "PCI PM: Suspend power state: %s\n",
+		pci_power_name(pci_dev->current_state));
+
 	pci_pm_set_unknown_state(pci_dev);
 
 	/*