suspend_stress_test -c N ( 1 < N < 5) is flaky on my borrowed link. 
/sys/firmware/log has this error: CBFS: ERROR: No file header found at fffff980, attempting to recover by searching for header
Is this WAI?


localhost ~ # suspend_stress_test -c 1                                                                                                                                                                                                                                                   
Running 1 iterations with:
  suspend: 5-10 seconds
  wake: 5-10 seconds
  backup_rtc: false
  errors_fatal: true
  fw_errors_fatal: true
  bugs fatal:  true
  warnings fatal:  false
  crcs fatal:  true
  suspend command: powerd_dbus_suspend --delay=0
  wakeup source to ignore: none
  record_dmesg_dir: 
  pm_print_times:  true
powerd start/running, process 3749
tlsdated stop/waiting
Suspend     1 of 1: sleep for  8 seconds...CBFS: ERROR: No file header found at fffff980, attempting to recover by searching for header
Firmware error found.

powerd start/running, process 4038
tlsdated start/running, process 4048

Finished 1 iterations.
Suspend_failures: 0
Firmware log errors: 1