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sys: ioq: event becomes signaled when ioq is disabled

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This commit is contained in:
Bill Zissimopoulos 2015-11-24 20:21:01 -08:00
parent cac74f3b63
commit 0f0b1f2c46
2 changed files with 11 additions and 5 deletions
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2
src/sys/fsctl.c
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@ -152,7 +152,7 @@ static NTSTATUS FspFsvrtTransact(
}
/* wait for a pending IRP */
while (0 == (PendingIrp = FspIoqNextPendingIrp(&FsvrtDeviceExtension->Ioq, 300)))
while (0 == (PendingIrp = FspIoqNextPendingIrp(&FsvrtDeviceExtension->Ioq, (ULONG)-1L)))
{
if (!FspIoqEnabled(&FsvrtDeviceExtension->Ioq))
return STATUS_CANCELLED;

14
src/sys/ioq.c
View File

@ -48,10 +48,11 @@
* +---------------------+
*
*
* Pending Queue Event Object
* Event Object
*
* Note that the Pending queue is controlled by a manual event object.
* The event object remains signaled for as long as the queue is not empty.
* The FSP_IOQ includes a manual event object. The event object remains
* signaled when the FSP_IOQ object is disabled or when the Pending queue
* is not empty.
*/
static NTSTATUS FspIoqPendingInsertIrpEx(PIO_CSQ IoCsq, PIRP Irp, PVOID InsertContext)
@ -68,7 +69,7 @@ static NTSTATUS FspIoqPendingInsertIrpEx(PIO_CSQ IoCsq, PIRP Irp, PVOID InsertCo
static VOID FspIoqPendingRemoveIrp(PIO_CSQ IoCsq, PIRP Irp)
{
FSP_IOQ *Ioq = CONTAINING_RECORD(IoCsq, FSP_IOQ, PendingIoCsq);
if (RemoveEntryList(&Irp->Tail.Overlay.ListEntry))
if (RemoveEntryList(&Irp->Tail.Overlay.ListEntry) && 0 < Ioq->Enabled)
/* list is empty; future threads should go to sleep */
KeClearEvent(&Ioq->PendingIrpEvent);
}
@ -76,6 +77,8 @@ static VOID FspIoqPendingRemoveIrp(PIO_CSQ IoCsq, PIRP Irp)
static PIRP FspIoqPendingPeekNextIrp(PIO_CSQ IoCsq, PIRP Irp, PVOID PeekContext)
{
FSP_IOQ *Ioq = CONTAINING_RECORD(IoCsq, FSP_IOQ, PendingIoCsq);
if (!PeekContext && 0 >= Ioq->Enabled)
return 0;
PLIST_ENTRY Head = &Ioq->PendingIrpList;
PLIST_ENTRY Entry = 0 == Irp ? Head->Flink : Irp->Tail.Overlay.ListEntry.Flink;
return Head != Entry ? CONTAINING_RECORD(Entry, IRP, Tail.Overlay.ListEntry) : 0;
@ -115,6 +118,8 @@ static VOID FspIoqProcessRemoveIrp(PIO_CSQ IoCsq, PIRP Irp)
static PIRP FspIoqProcessPeekNextIrp(PIO_CSQ IoCsq, PIRP Irp, PVOID PeekContext)
{
FSP_IOQ *Ioq = CONTAINING_RECORD(IoCsq, FSP_IOQ, ProcessIoCsq);
if (!PeekContext && 0 >= Ioq->Enabled)
return 0;
PLIST_ENTRY Head = &Ioq->ProcessIrpList;
PLIST_ENTRY Entry = 0 == Irp ? Head->Flink : Irp->Tail.Overlay.ListEntry.Flink;
for (; Head != Entry; Entry = Entry->Flink)
@ -182,6 +187,7 @@ VOID FspIoqDisable(FSP_IOQ *Ioq)
KIRQL Irql;
KeAcquireSpinLock(&Ioq->SpinLock, &Irql);
Ioq->Enabled = 0;
KeSetEvent(&Ioq->PendingIrpEvent, 1, FALSE);
KeReleaseSpinLock(&Ioq->SpinLock, Irql);
}