earlysuspend: add verbose debug flag

when enabled, prints out the function of each handler as they are called

Change-Id: I5ed251867e0e3aa3cd05f030ff3579808cedd0c2
Signed-off-by: Erik Gilling <konkers@android.com>

diff --git a/kernel/power/earlysuspend.c b/kernel/power/earlysuspend.c
index 84bed51dcdce79503d718186775e690560d4637b..b15f02eba45cb7cc2d5f2bb6854a94124f6967cb 100644 (file)
--- a/kernel/power/earlysuspend.c
+++ b/kernel/power/earlysuspend.c
@@ -26,6 +26,7 @@
 enum {
        DEBUG_USER_STATE = 1U << 0,
        DEBUG_SUSPEND = 1U << 2,
+       DEBUG_VERBOSE = 1U << 3,
 };
 static int debug_mask = DEBUG_USER_STATE;
 module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
@@ -94,8 +95,11 @@ static void early_suspend(struct work_struct *work)
        if (debug_mask & DEBUG_SUSPEND)
                pr_info("early_suspend: call handlers\n");
        list_for_each_entry(pos, &early_suspend_handlers, link) {
-               if (pos->suspend != NULL)
+               if (pos->suspend != NULL) {
+                       if (debug_mask & DEBUG_VERBOSE)
+                               pr_info("early_suspend: calling %pf\n", pos->suspend);
                        pos->suspend(pos);
+               }
        }
        mutex_unlock(&early_suspend_lock);
 
@@ -131,9 +135,14 @@ static void late_resume(struct work_struct *work)
        }
        if (debug_mask & DEBUG_SUSPEND)
                pr_info("late_resume: call handlers\n");
-       list_for_each_entry_reverse(pos, &early_suspend_handlers, link)
-               if (pos->resume != NULL)
+       list_for_each_entry_reverse(pos, &early_suspend_handlers, link) {
+               if (pos->resume != NULL) {
+                       if (debug_mask & DEBUG_VERBOSE)
+                               pr_info("late_resume: calling %pf\n", pos->resume);
+
                        pos->resume(pos);
+               }
+       }
        if (debug_mask & DEBUG_SUSPEND)
                pr_info("late_resume: done\n");
 abort: