[Description]:

 Don't need disable the legacy USB SMI in UHCI and EHCI, which is only required by UoL.
[Impaction]:
 Uhci and Ehci driver default don't need disable the legacy USB SMI.
[Reference Info]:
 EDK tracker 1082

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4850 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c b/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
index e8fb1120b7736b1f680a27a9f73784b4f7086989..949aa0496a4f4e7826245f5d743676bed95aa9ef 100644 (file)
--- a/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
+++ b/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
@@ -1578,8 +1578,9 @@ EhcDriverBindingStart (
 \r
   //\r
   // Robustnesss improvement such as for UoL\r
+  // Default is not required.\r
   //\r
-  EhcClearLegacySupport (Ehc);\r
+  // EhcClearLegacySupport (Ehc);\r
   EhcResetHC (Ehc, EHC_RESET_TIMEOUT);\r
 \r
   Status = EhcInitHC (Ehc);\r

diff --git a/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c b/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
index d129af8715c6e41969c710d2416a447f865ae056..0fc633d8bbfaeb5ce91785b0d213a88debb26ed5 100644 (file)
--- a/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
+++ b/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
@@ -1654,7 +1654,11 @@ UhciDriverBindingStart (
   }\r
   PciAttributesSaved = TRUE;\r
 \r
-  UhciTurnOffUsbEmulation (PciIo);\r
+  //\r
+  // Robustnesss improvement such as for UoL\r
+  // Default is not required.\r
+  //\r
+  // UhciTurnOffUsbEmulation (PciIo);\r
 \r
   Status = PciIo->Attributes (\r
                     PciIo,\r