How to give CAP_BLOCK_SUSPEND permission for specific application?

[yangwoo lee]

I got error message like below. (I'm using Android 7.0 nougot)

 [1:           gpsd: 2855] CPU: 1 MPIDR: 80000001 PID: 2855 Comm: gpsd Tainted: G        W      3.18.14-g6077be6-dirty #59  // This line is printed dump_stack. I added dump_stack() in wakelock.c to know which process requesting wakelock. it means that below messages are related with gpsd application.

1740  2855 E GNSS    : 10:27:40.919|E|      lal_wakelock.c.0164| Wakelock: write /sys/power/wake_lock fd:31 ret:-1 errno 1

1740  2855 E GNSS    : 10:27:41.037|E|      lal_wakelock.c.0164| Wakelock: write /sys/power/wake_unlock fd:31 ret:-1 errno 1

Finally I found that it occurred by whether allowed CAP_BLOCK_SUSPEND.

So I added some code. but  it is still happening. I need help...at least I want know how to debug it.

init.mydevice.rc

@@ -276,6 +276,7 @@ service gpsd /system/bin/gpsd

     class main

     user gps

     group system inet wakelock

+    capabilities BLOCK_SUSPEND

sepolicy/gpsd.te

@@ -1,4 +1,5 @@

 # gpsd - GPS daemon

+wakelock_use(gpsd);

 allow gpsd sysfs_wake_lock:file w_file_perms;