/**
* @brief handles child device processing on device removal.
*
* @param[in] Device handle to the WDFDEVICE created by FdoEvtDeviceAdd().
*
*/
VOID RemoveAllChildDevices(
IN WDFDEVICE Device)
{
WdfFdoLockStaticChildListForIteration(Device);
WDFDEVICE hChild = NULL;
while ((hChild = WdfFdoRetrieveNextStaticChild(
Device,
hChild,
WdfRetrieveAddedChildren)) != NULL)
{
NTSTATUS Status = WdfPdoMarkMissing(hChild);
if (!NT_SUCCESS(Status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_DEVICE,
__FUNCTION__": Device %p WdfPdoMarkMissing %p error %x\n",
Device,
hChild,
Status);
XXX_TODO("What to do with a pdo we can't mark missing?\n");
}
else
{
TraceEvents(TRACE_LEVEL_WARNING, TRACE_DEVICE,
__FUNCTION__": Device %p WdfPdoMarkMissing %p\n",
Device,
hChild);
WDF_DEVICE_STATE deviceState;
WDF_DEVICE_STATE_INIT (&deviceState);
deviceState.Removed = WdfTrue;
WdfDeviceSetDeviceState(hChild,
&deviceState);
}
}
WdfFdoUnlockStaticChildListFromIteration(Device);
}
NTSTATUS
Bus_UnPlugDevice(
WDFDEVICE Device,
ULONG SerialNo
)
/*++
Routine Description:
The application has told us a device has departed from the bus.
We therefore need to flag the PDO as no longer present
and then tell Plug and Play about it.
Arguments:
Returns:
STATUS_SUCCESS upon successful removal from the list
STATUS_INVALID_PARAMETER if the removal was unsuccessful
--*/
{
PPDO_DEVICE_DATA pdoData;
BOOLEAN found = FALSE;
BOOLEAN plugOutAll;
WDFDEVICE hChild;
NTSTATUS status = STATUS_INVALID_PARAMETER;
PAGED_CODE ();
plugOutAll = (0 == SerialNo) ? TRUE : FALSE;
hChild = NULL;
WdfFdoLockStaticChildListForIteration(Device);
while ((hChild = WdfFdoRetrieveNextStaticChild(Device,
hChild, WdfRetrieveAddedChildren)) != NULL) {
if (plugOutAll) {
status = WdfPdoMarkMissing(hChild);
if(!NT_SUCCESS(status)) {
KdPrint(("WdfPdoMarkMissing failed 0x%x\n", status));
break;
}
found = TRUE;
}
else {
pdoData = PdoGetData(hChild);
if (SerialNo == pdoData->SerialNo) {
status = WdfPdoMarkMissing(hChild);
if(!NT_SUCCESS(status)) {
KdPrint(("WdfPdoMarkMissing failed 0x%x\n", status));
break;
}
found = TRUE;
break;
}
}
}
WdfFdoUnlockStaticChildListFromIteration(Device);
if (found) {
status = STATUS_SUCCESS;
}
return status;
}
