ArmVirtualizationPkg/PciHostBridgeDxe: handle 0 in GetProposedResources()
When there are no devices connected to the root bridge, no resources are needed. GetProposedResources() currently considers this an invalid condition (the PI spec doesn't regulate it). Emitting an empty set of EFI_ACPI_ADDRESS_SPACE_DESCRIPTORs, followed by the required EFI_ACPI_END_TAG_DESCRIPTOR, allows PciHostBridgeResourceAllocator() [MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c] to advance. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Olivier Martin <Olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16908 6f19259b-4bc3-4df7-8a09-765794883524
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@@ -1079,7 +1079,15 @@ GetProposedResources(
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}
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if (Number == 0) {
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return EFI_INVALID_PARAMETER;
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EFI_ACPI_END_TAG_DESCRIPTOR *End;
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End = AllocateZeroPool (sizeof *End);
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if (End == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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End->Desc = ACPI_END_TAG_DESCRIPTOR;
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*Configuration = End;
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return EFI_SUCCESS;
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}
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Buffer = AllocateZeroPool (Number * sizeof(EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) + sizeof(EFI_ACPI_END_TAG_DESCRIPTOR));
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