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OvmfPkg/VirtioScsiDxe: protect against interrupts (e.g., timer) #6

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OvmfPkg/VirtioScsiDxe: protect against interrupts (e.g., timer) #6

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5 changes: 5 additions & 0 deletions OvmfPkg/VirtioScsiDxe/VirtioScsi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -446,6 +446,7 @@ VirtioScsiPassThru (
VOID *InDataBuffer;
UINTN InDataNumPages;
BOOLEAN OutDataBufferIsMapped;
EFI_TPL CurrentTpl;

//
// Set InDataMapping,OutDataMapping,InDataDeviceAddress and OutDataDeviceAddress to
Expand Down Expand Up @@ -596,6 +597,8 @@ VirtioScsiPassThru (
goto FreeResponseBuffer;
}

CurrentTpl = gBS->RaiseTPL (TPL_NOTIFY);

VirtioPrepare (&Dev->Ring, &Indices);

//
Expand Down Expand Up @@ -664,10 +667,12 @@ VirtioScsiPassThru (
NULL
) != EFI_SUCCESS)
{
gBS->RestoreTPL (CurrentTpl);
Status = ReportHostAdapterError (Packet);
goto UnmapResponseBuffer;
}

gBS->RestoreTPL (CurrentTpl);
Status = ParseResponse (Packet, Response);

//
Expand Down
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