[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, 8 insertions, 0 deletions

diff --git a/include/linux/pm.h b/include/linux/pm.h
index 6df2585c0169..66be58902b17 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -199,6 +199,12 @@ extern int device_suspend(pm_message_t state);
 
 extern int dpm_runtime_suspend(struct device *, pm_message_t);
 extern void dpm_runtime_resume(struct device *);
+extern void __suspend_report_result(const char *function, void *fn, int ret);
+
+#define suspend_report_result(fn, ret)                                  \
+        do {                                                            \
+                __suspend_report_result(__FUNCTION__, fn, ret);         \
+        } while (0)
 
 #else /* !CONFIG_PM */
 
@@ -219,6 +225,8 @@ static inline void dpm_runtime_resume(struct device * dev)
 {
 }
 
+#define suspend_report_result(fn, ret) do { } while (0)
+
 #endif
 
 /* changes to device_may_wakeup take effect on the next pm state change.