Fixed potential issues to release resources when error occurs.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4341 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 15 insertions, 10 deletions

diff --git a/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c b/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
index 82142b6a85..b52510041f 100644
--- a/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
+++ b/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
@@ -2133,6 +2133,7 @@ UhciDriverBindingStart (
   USB_HC_DEV          *Uhc;

   UINT64              Supports;

   UINT64              OriginalPciAttributes;

+  BOOLEAN             PciAttributesSaved;

 

   //

   // Open PCIIO, then enable the EHC device and turn off emulation

@@ -2151,6 +2152,7 @@ UhciDriverBindingStart (
     return Status;

   }

 

+  PciAttributesSaved = FALSE;

   //

   // Save original PCI attributes

   //

@@ -2162,8 +2164,9 @@ UhciDriverBindingStart (
                     );

 

   if (EFI_ERROR (Status)) {

-    return Status;

+    goto CLOSE_PCIIO;

   }

+  PciAttributesSaved = TRUE;

 

   UhciTurnOffUsbEmulation (PciIo);

 

@@ -2262,15 +2265,17 @@ FREE_UHC:
   UhciFreeDev (Uhc);

 

 CLOSE_PCIIO:

-  //

-  // Restore original PCI attributes

-  //

-  PciIo->Attributes (

-                  PciIo,

-                  EfiPciIoAttributeOperationSet,

-                  OriginalPciAttributes,

-                  NULL

-                  );

+  if (PciAttributesSaved == TRUE) {

+    //

+    // Restore original PCI attributes

+    //

+    PciIo->Attributes (

+                    PciIo,

+                    EfiPciIoAttributeOperationSet,

+                    OriginalPciAttributes,

+                    NULL

+                    );

+  }

 

   gBS->CloseProtocol (

         Controller,