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Vioser: Better cooperation with QGA during device removals #1435

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Vioser: Better cooperation with QGA during device removals #1435

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29 changes: 29 additions & 0 deletions vioserial/sys/Port.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,12 +13,14 @@ EVT_WDF_WORKITEM VIOSerialInitPortConsoleWork;
EVT_WDF_REQUEST_CANCEL VIOSerialPortReadRequestCancel;
EVT_WDF_DEVICE_D0_ENTRY VIOSerialPortEvtDeviceD0Entry;
EVT_WDF_DEVICE_D0_EXIT VIOSerialPortEvtDeviceD0Exit;
EVT_WDF_DEVICE_QUERY_REMOVE VIOSerialPortEvtDeviceQueryRemove;

#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, VIOSerialDeviceListCreatePdo)
#pragma alloc_text(PAGE, VIOSerialPortWrite)
#pragma alloc_text(PAGE, VIOSerialPortDeviceControl)
#pragma alloc_text(PAGE, VIOSerialPortEvtDeviceD0Entry)
#pragma alloc_text(PAGE, VIOSerialPortEvtDeviceQueryRemove)
#endif

PVIOSERIAL_PORT
Expand Down Expand Up @@ -361,6 +363,7 @@ VIOSerialDeviceListCreatePdo(IN WDFCHILDLIST DeviceList,
WDF_PNPPOWER_EVENT_CALLBACKS_INIT(&PnpPowerCallbacks);
PnpPowerCallbacks.EvtDeviceD0Entry = VIOSerialPortEvtDeviceD0Entry;
PnpPowerCallbacks.EvtDeviceD0Exit = VIOSerialPortEvtDeviceD0Exit;
PnpPowerCallbacks.EvtDeviceQueryRemove = VIOSerialPortEvtDeviceQueryRemove;
WdfDeviceInitSetPnpPowerEventCallbacks(ChildInit, &PnpPowerCallbacks);

WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(&attributes, RAWPDO_VIOSERIAL_PORT);
Expand Down Expand Up @@ -1263,6 +1266,32 @@ VOID VIOSerialPortWriteIoStop(IN WDFQUEUE Queue, IN WDFREQUEST Request, IN ULONG
TraceEvents(TRACE_LEVEL_ERROR, DBG_WRITE, "<-- %s\n", __FUNCTION__);
}

NTSTATUS VIOSerialPortEvtDeviceQueryRemove(WDFDEVICE Device)
{
WDFREQUEST readRequest = NULL;
PRAWPDO_VIOSERIAL_PORT pdoData = RawPdoSerialPortGetData(Device);
PVIOSERIAL_PORT port = pdoData->port;

TraceEvents(TRACE_LEVEL_INFORMATION, DBG_PNP, "--> %s\n", __FUNCTION__);

WdfSpinLockAcquire(port->InBufLock);
readRequest = port->PendingReadRequest;
port->PendingReadRequest = NULL;
if (readRequest != NULL)
{
if (WdfRequestUnmarkCancelable(readRequest) != STATUS_CANCELLED)
{
WdfRequestCompleteWithInformation(readRequest, STATUS_END_OF_FILE, 0L);
}
}

WdfSpinLockRelease(port->InBufLock);

TraceEvents(TRACE_LEVEL_INFORMATION, DBG_PNP, "<-- %s\n", __FUNCTION__);

return STATUS_SUCCESS;
}

NTSTATUS VIOSerialPortEvtDeviceD0Entry(IN WDFDEVICE Device, IN WDF_POWER_DEVICE_STATE PreviousState)
{
PVIOSERIAL_PORT port = RawPdoSerialPortGetData(Device)->port;
Expand Down