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

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@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 3d04b59ffdb2ac5dbe815601cc6d49b62a3d1fd0..9be563067c0cd2c149b7b8ff5fe04791ba85b5bb 100644 (file)
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -798,6 +798,9 @@ static int pci_pm_suspend_noirq(struct device *dev)
                        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);
 
        /*