WdfPdoMarkMissing method
[Applies to KMDF only]
The WdfPdoMarkMissing method informs the framework that a device is no longer accessible.
Syntax
NTSTATUS WdfPdoMarkMissing(
[in] WDFDEVICE Device
);
Parameters
- Device [in]
-
A handle to a framework device object that represents the device's physical device object (PDO).
Return value
If the operation succeeds, the function returns STATUS_SUCCESS. Additional return values include:
| Return code | Description |
|---|---|
|
The Device handle does not represent a PDO. |
|
The device object could not be found. |
The method might also return other NTSTATUS values.
A system bug check occurs if the driver supplies an invalid object handle.
Remarks
For more information about WdfPdoMarkMissing, see Static Enumeration.
Examples
The following code example searches a list of child devices to find one that matches a specified serial number. When the example finds the correct child, it calls WdfPdoMarkMissing to indicate that the child is not accessible. This example was taken from the Toaster sample bus driver and simplified.
WDFDEVICE hChild = NULL;
NTSTATUS status = STATUS_INVALID_PARAMETER;
BOOLEAN found = FALSE;
PPDO_DEVICE_DATA pdoData;
WdfFdoLockStaticChildListForIteration(Device);
while ((hChild = WdfFdoRetrieveNextStaticChild(
Device,
hChild,
WdfRetrieveAddedChildren
)) != NULL) {
pdoData = PdoGetData(hChild); // Device object context space
if (SerialNo == pdoData->SerialNo) {
status = WdfPdoMarkMissing(hChild);
if(!NT_SUCCESS(status)) {
KdPrint(("WdfPdoMarkMissing failed 0x%x\n", status));
break;
}
found = TRUE;
break;
}
}
WdfFdoUnlockStaticChildListFromIteration(Device);
Requirements
|
Minimum KMDF version | 1.0 |
|---|---|
|
Header |
|
|
Library |
|
|
IRQL | <= DISPATCH_LEVEL |
|
DDI compliance rules | DriverCreate, KmdfIrql, KmdfIrql2 |
See also
- WdfFdoLockStaticChildListForIteration
- WdfFdoRetrieveNextStaticChild
- WdfFdoUnlockStaticChildListFromIteration
