PCIe MSI interrupt sharing problem

Host: Windows 7 KDMF device driver

FPGA: Cyclone V GT PCIe hard IP with DMA interface

The ISR():

BOOLEAN PCIeEvtInterruptIsr(IN WDFINTERRUPT Interrupt, IN ULONG MessageID)

{

PFDO_DATA FdoData = NULL;

ULONG ulStatusR = 1;

ULONG ulStatusW = 1;

for (i = 0; i < bNumOfWriteDesc; i++) {//check All Write Status

ulStatusW &= pWriteReg->ulStatus;

}

if (ulstatusw != 0) { //write complete

fdodata->ulirqcntw++;

if (fdodata->m_ulloopsw > 0 && fdodata->m_ulloopsw < 0x7fffffff) {

fdodata->m_ulloopsw--;

bdowrite = true; //more to go

}

else {//done

rtlzeromemory(pwritereg, 0x200);//clears all write status

fdodata->ulwritedone = 1;

}

}

else {

for (i = 0; i < bnumofreaddesc; i++) {//check all read status

ulstatusr &= preadreg->ulstatus;

}

if (ulStatusR != 0) { //Read Complete

FdoData->ulIRQCntR++;

if (FdoData->m_ulLoopsR > 0 && FdoData->m_ulLoopsR < 0x7FFFFFFF) {

FdoData->m_ulLoopsR--;

bDoRead = TRUE;//more to go

}

else {//Done

RtlZeroMemory(pReadReg, 0x200);//Clears all Read Status

FdoData->ulReadDone = 1;

}

}

else {

FdoData->ulErrors++;

WdfInterruptQueueDpcForIsr(Interrupt);

return FALSE;

}

}

if (bDoWrite) {

RtlZeroMemory((PUCHAR)pStatusRegW, 0x200);//Clears all Write Status

LastPtr = bNumOfReadDesc;

}

if (bDoRead) {

RtlZeroMemory((PUCHAR)pStatusRegR, 0x200);//Clears all Read Status

LastPtr = bNumOfWriteDesc;

}

if (FdoData->ulReadDone == 1 || FdoData->ulWriteDone == 1) {

WdfInterruptQueueDpcForIsr(Interrupt); //processing

}

return TRUE;

}

Thanks,