In order to create all of the children (El Torito standard and UDF) for
a CD/DVD media in an entry of the PartitionDriverBindingStart(), this
commit merges the discovery of the El Torito feature
(PartitionInstallElToritoChildHandles) into function
PartitionInstallUdfChildHandles.

Cc: Paulo Alcantara <pcacjr@zytor.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
---
 MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c |  7 +++----
 MdeModulePkg/Universal/Disk/PartitionDxe/Udf.c       | 17 +++++++++++++++++
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c b/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
index f6030e0897..603abfe55a 100644
--- a/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
+++ b/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
@@ -43,7 +43,6 @@ EFI_DRIVER_BINDING_PROTOCOL gPartitionDriverBinding = {
 //
 PARTITION_DETECT_ROUTINE mPartitionDetectRoutineTable[] = {
   PartitionInstallGptChildHandles,
-  PartitionInstallElToritoChildHandles,
   PartitionInstallMbrChildHandles,
   PartitionInstallUdfChildHandles,
   NULL
@@ -306,9 +305,9 @@ PartitionDriverBindingStart (
   if (BlockIo->Media->MediaPresent ||
       (BlockIo->Media->RemovableMedia && !BlockIo->Media->LogicalPartition)) {
     //
-    // Try for GPT, then El Torito, then UDF, and then legacy MBR partition
-    // types. If the media supports a given partition type install child handles
-    // to represent the partitions described by the media.
+    // Try for GPT, then legacy MBR partition types, and then UDF and El Torito.
+    // If the media supports a given partition type install child handles to
+    // represent the partitions described by the media.
     //
     Routine = &mPartitionDetectRoutineTable[0];
     while (*Routine != NULL) {
diff --git a/MdeModulePkg/Universal/Disk/PartitionDxe/Udf.c b/MdeModulePkg/Universal/Disk/PartitionDxe/Udf.c
index 7eee748958..f6f0ff37d8 100644
--- a/MdeModulePkg/Universal/Disk/PartitionDxe/Udf.c
+++ b/MdeModulePkg/Universal/Disk/PartitionDxe/Udf.c
@@ -704,6 +704,23 @@ PartitionInstallUdfChildHandles (
   }
 
   //
+  // Detect El Torito feature first.
+  // And always continue to search for UDF.
+  //
+  Status = PartitionInstallElToritoChildHandles (
+             This,
+             Handle,
+             DiskIo,
+             DiskIo2,
+             BlockIo,
+             BlockIo2,
+             DevicePath
+             );
+  if (!EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_INFO, "PartitionDxe: El Torito standard found on handle 0x%p.\n", Handle));
+  }
+
+  //
   // Search for an UDF file system on block device
   //
   Status = FindUdfFileSystem (BlockIo, DiskIo, &StartingLBA, &EndingLBA);
-- 
2.12.0.windows.1

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