Blocking call in bus child D0 Exit triggers BSOD

[nefarius]

Original issue.

Replace synchronous call to radio disconnect with async variant or apply timeout for request cancellation here.

[nefarius]

Not sure if the assumption is valid though, according to trace log and crash dump there is no pending IRP for the disconnect command:

715522202: BthPS3_PDO_EvtWdfDeviceD0Exit [BthPS3_PDO_EvtWdfDeviceD0Exit] --> Entry
715522202: BthPS3_PDO_EvtWdfDeviceD0Exit [BthPS3_PDO_EvtWdfDeviceD0Exit]Requesting device disconnect
715522202: BthPS3_PDO_EvtWdfDeviceD0Exit [BthPS3_PDO_EvtWdfDeviceD0Exit] <-- Exit <status=STATUS_SUCCESS>

>[IRP_MJ_POWER(16), IRP_MN_SET_POWER(2)]
            0 e1 ffffe38c0ffc6de0 00000000 00000000-00000000    pending
	       \Driver\BthPS3
			Args: 00041100 00000001 00000001 00000002
 [IRP_MJ_POWER(16), IRP_MN_SET_POWER(2)]
            0  1 ffffe38c0f6da9c0 00000000 00000000-00000000    pending
	       \Driver\WudfRd
			Args: 00041100 00000001 00000001 00000002
 [IRP_MJ_POWER(16), IRP_MN_SET_POWER(2)]
            0 e0 ffffe38c105dc060 00000000 fffff802bf024f90-ffffe38c105dc1b0 Success Error Cancel 
	       \Driver\mshidumdf	HIDCLASS!HidpFdoPowerCompletion
			Args: 00041100 00000001 00000001 00000002
 [IRP_MJ_POWER(16), IRP_MN_SET_POWER(2)]
            0 e1 ffffe38c105dc060 00000000 fffff8027a177bc0-ffffe38c104271e8 Success Error Cancel pending
	       \Driver\mshidumdf	nt!PopRequestCompletion
			Args: 00041100 00000001 00000001 00000002

11: kd> !poaction
PopAction: fffff8027aa23480
  State..........: 0 - Idle
  Updates........: 0 
  Action.........: None
  Lightest State.: Unspecified
  Flags..........: 10000003 QueryApps|UIAllowed
  Irp minor......: ??
  System State...: Unspecified
  Hiber Context..: 0000000000000000

Allocated power irps (PopIrpList - fffff8027aa23c00)
  IRP: ffffe38c016bd010 (wait-wake/S3), PDO: ffffe38bfe974a70
  IRP: ffffe38c10749010 (set/D0,), PDO: ffffe38c0ffc6de0, CURRENT: ffffe38c0ffc6de0
  IRP: ffffe38c06613050 (wait-wake/S4), PDO: ffffe38c06805120
  IRP: ffffe38c105158a0 (wait-wake/S4), PDO: ffffe38c0179f0a0
  IRP: ffffe38c0de1f940 (wait-wake/S0), PDO: ffffe38c01e962c0

Irp worker threads (PopIrpThreadList - fffff8027aa20c40)
  THREAD: ffffe38bfc149080 (static)
  THREAD: ffffe38bfc0ee080 (static)

Broadcast in progress: FALSE
Is Directed DRIPS Transition: FALSE

No Device State present

Need some more digging...

[nefarius]

Nope, totally false alarm, was the function drivers' fault 😬