This is hard-coded in the IntThunk structure, and the additional entries
will be needed for other devices like VirtIO and NVMe disks. So admit
that they exist.

Signed-off-by: David Woodhouse <dw...@infradead.org>
Acked-by: Laszlo Ersek <ler...@redhat.com>
---
 OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c 
b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c
index 05e3ffd2bb..69abd06c40 100644
--- a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c
+++ b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c
@@ -568,7 +568,7 @@ ShadowAndStartLegacy16 (
   //
   // Skip Floppy and possible onboard IDE drives
   //
-  EfiToLegacy16BootTable->NumberBbsEntries = 1 + 2 * MAX_IDE_CONTROLLER;
+  EfiToLegacy16BootTable->NumberBbsEntries = 
sizeof(Private->IntThunk->BbsTable) / sizeof(BBS_TABLE);
 
   for (Index = 0; Index < (sizeof (Private->IntThunk->BbsTable) / sizeof 
(BBS_TABLE)); Index++) {
     BbsTable[Index].BootPriority = BBS_IGNORE_ENTRY;
-- 
2.21.0


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