[PATCH] pm: print name of failed suspend function

Print more diagnostic info to help identify the source of power management
suspend failures.

Example:

usb_hcd_pci_suspend(): pci_set_power_state+0x0/0x1af() returns -22
pci_device_suspend(): usb_hcd_pci_suspend+0x0/0x11b() returns -22
suspend_device(): pci_device_suspend+0x0/0x34() returns -22

Work-in-progress.  It needs lots more suspend_report_result() calls sprinkled
everywhere.

Cc: Patrick Mochel <mochel@digitalimplant.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@suspend2.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 0d2193b69235..66b78404ab34 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -213,11 +213,9 @@ int usb_hcd_pci_suspend (struct pci_dev *dev, pm_message_t message)
 
         if (hcd->driver->suspend) {
                 retval = hcd->driver->suspend(hcd, message);
-                if (retval) {
-                        dev_dbg (&dev->dev, "PCI pre-suspend fail, %d\n",
-                                retval);
+                suspend_report_result(hcd->driver->suspend, retval);
+                if (retval)
                         goto done;
-                }
         }
         synchronize_irq(dev->irq);
 
@@ -263,6 +261,7 @@ int usb_hcd_pci_suspend (struct pci_dev *dev, pm_message_t message)
                  * some device state (e.g. as part of clock reinit).
                  */
                 retval = pci_set_power_state (dev, PCI_D3hot);
+                suspend_report_result(pci_set_power_state, retval);
                 if (retval == 0) {
                         int wake = device_can_wakeup(&hcd->self.root_hub->dev);