74 lines
2 KiB
C
74 lines
2 KiB
C
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#include "pch.h"
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NTSTATUS
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PptFdoCreateOpen(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This is the dispatch function for IRP_MJ_CREATE.
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Arguments:
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DeviceObject - The target device object for the request.
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Irp - The I/O request packet.
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Return Value:
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STATUS_SUCCESS - If Success.
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STATUS_DELETE_PENDING - If this device is in the process of being removed
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and will go away as soon as all outstanding
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requests are cleaned up.
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--*/
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{
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PFDO_EXTENSION fdx = DeviceObject->DeviceExtension;
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NTSTATUS status = STATUS_SUCCESS;
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PAGED_CODE();
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//
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// Verify that our device has not been SUPRISE_REMOVED. Generally
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// only parallel ports on hot-plug busses (e.g., PCMCIA) and
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// parallel ports in docking stations will be surprise removed.
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//
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// dvdf - RMT - It would probably be a good idea to also check
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// here if we are in a "paused" state (stop-pending, stopped, or
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// remove-pending) and queue the request until we either return to
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// a fully functional state or are removed.
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//
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if( fdx->PnpState & PPT_DEVICE_SURPRISE_REMOVED ) {
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return P4CompleteRequest( Irp, STATUS_DELETE_PENDING, Irp->IoStatus.Information );
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}
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//
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// Try to acquire RemoveLock to prevent the device object from going
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// away while we're using it.
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//
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status = PptAcquireRemoveLockOrFailIrp( DeviceObject, Irp );
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if ( !NT_SUCCESS(status) ) {
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return status;
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}
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//
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// We have the RemoveLock - handle CREATE
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//
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ExAcquireFastMutex(&fdx->OpenCloseMutex);
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InterlockedIncrement(&fdx->OpenCloseRefCount);
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ExReleaseFastMutex(&fdx->OpenCloseMutex);
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DD((PCE)fdx,DDT,"PptFdoCreateOpen - SUCCEED - new OpenCloseRefCount=%d\n",fdx->OpenCloseRefCount);
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PptReleaseRemoveLock(&fdx->RemoveLock, Irp);
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P4CompleteRequest( Irp, status, 0 );
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return status;
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}
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