[Qemu-devel] Fwd: [question] About MSI for vioscsi

[Wangting (Kathy)]

Hi Vadim,

   In order to enable MSI for vioscsi in virtio-win-0.1-74, I try to merge

the patch about Bug 1077566 into it, but I find that MSI still doesn't work,

because the value of IRQ is not negative in the device manager.

   I try to trace the I/O path with ENABLE_COM_DEBUG, and I find that

pMsixCapOffset->MessageControl.MSIXEnable is zero when

StorPortGetBusData returned in VioScsiFindAdapter, so MSI can't be enabled.

   I have tested that MSI is successfully enabled in virtio-win-0.1-81.

But I still want to find out why the patch is not work in virtio-win-0.1-74.

Is there some important points I missed?

   Thank you very much.

   Best wishes,

   Ting Wang