WdfPdoMarkMissing function (wdfpdo.h)

[Applies to KMDF only]

The WdfPdoMarkMissing method informs the framework that a device is no longer accessible.

Syntax

NTSTATUS WdfPdoMarkMissing(
 [in] WDFDEVICE Device
);

Parameters

[in] Device

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:

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

See also

WdfFdoLockStaticChildListForIteration

WdfFdoRetrieveNextStaticChild

WdfFdoUnlockStaticChildListFromIteration