[patch 2/3] MdeModulePkg/UdfDxe: Don't use non-constant expression in array

[Dandan Bi <dandan.bi@intel.com>]

Remove the DescriptorLBAs[] array with non-constant expression to fix
non-constant aggregate initializer warning in VS tool chains.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Paulo Alcantara <pcacjr@zytor.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
---
 .../Universal/Disk/UdfDxe/FileSystemOperations.c   | 93 +++++++++++++++++-----
 1 file changed, 72 insertions(+), 21 deletions(-)

diff --git a/MdeModulePkg/Universal/Disk/UdfDxe/FileSystemOperations.c b/MdeModulePkg/Universal/Disk/UdfDxe/FileSystemOperations.c
index 0de9c71..03fda16 100644
--- a/MdeModulePkg/Universal/Disk/UdfDxe/FileSystemOperations.c
+++ b/MdeModulePkg/Universal/Disk/UdfDxe/FileSystemOperations.c
@@ -20,34 +20,85 @@ FindAnchorVolumeDescriptorPointer (
   IN   EFI_DISK_IO_PROTOCOL                  *DiskIo,
   OUT  UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER  *AnchorPoint
   )
 {
   EFI_STATUS  Status;
-  UINT32      BlockSize = BlockIo->Media->BlockSize;
-  EFI_LBA     EndLBA = BlockIo->Media->LastBlock;
-  EFI_LBA     DescriptorLBAs[] = { 256, EndLBA - 256, EndLBA, 512 };
-  UINTN       Index;
+  UINT32      BlockSize;
+  EFI_LBA     EndLBA;
 
-  for (Index = 0; Index < ARRAY_SIZE (DescriptorLBAs); Index++) {
-    Status = DiskIo->ReadDisk (
-      DiskIo,
-      BlockIo->Media->MediaId,
-      MultU64x32 (DescriptorLBAs[Index], BlockSize),
-      sizeof (UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER),
-      (VOID *)AnchorPoint
-      );
-    if (EFI_ERROR (Status)) {
-      return Status;
-    }
-    //
-    // Check if read LBA has a valid AVDP descriptor.
-    //
-    if (IS_AVDP (AnchorPoint)) {
-      return EFI_SUCCESS;
-    }
+  BlockSize = BlockIo->Media->BlockSize;
+  EndLBA = BlockIo->Media->LastBlock;
+
+  Status = DiskIo->ReadDisk (
+    DiskIo,
+    BlockIo->Media->MediaId,
+    MultU64x32 (256, BlockSize),
+    sizeof (UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER),
+    (VOID *)AnchorPoint
+    );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  //
+  // Check if read LBA has a valid AVDP descriptor.
+  //
+  if (IS_AVDP (AnchorPoint)) {
+    return EFI_SUCCESS;
+  }
+
+  Status = DiskIo->ReadDisk (
+    DiskIo,
+    BlockIo->Media->MediaId,
+    MultU64x32 (EndLBA - 256, BlockSize),
+    sizeof (UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER),
+    (VOID *)AnchorPoint
+    );
+  if (EFI_ERROR (Status)) {
+    return Status;
   }
   //
+  // Check if read LBA has a valid AVDP descriptor.
+  //
+  if (IS_AVDP (AnchorPoint)) {
+    return EFI_SUCCESS;
+  }
+
+  Status = DiskIo->ReadDisk (
+    DiskIo,
+    BlockIo->Media->MediaId,
+    MultU64x32 (EndLBA, BlockSize),
+    sizeof (UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER),
+    (VOID *)AnchorPoint
+    );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  //
+  // Check if read LBA has a valid AVDP descriptor.
+  //
+  if (IS_AVDP (AnchorPoint)) {
+    return EFI_SUCCESS;
+  }
+
+  Status = DiskIo->ReadDisk (
+    DiskIo,
+    BlockIo->Media->MediaId,
+    MultU64x32 (512, BlockSize),
+    sizeof (UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER),
+    (VOID *)AnchorPoint
+    );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  //
+  // Check if read LBA has a valid AVDP descriptor.
+  //
+  if (IS_AVDP (AnchorPoint)) {
+    return EFI_SUCCESS;
+  }
+
+  //
   // No AVDP found.
   //
   return EFI_VOLUME_CORRUPTED;
 }
 
-- 
1.9.5.msysgit.1