X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdeModulePkg%2FBus%2FPci%2FPciBusDxe%2FPciEnumeratorSupport.c;h=81171c82d9e21500ceaf25464d78d196904b02b2;hp=f73756a31ecd9dcf40b1011bc85d2083d814ca06;hb=a8035b908655afd59321173752b29970ae61601b;hpb=8315563285719f09f13e69a408f34558fc41c822

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
index f73756a31e..81171c82d9 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
@@ -1218,12 +1218,11 @@ DetermineDeviceAttribute (
       return Status;
     }
     //
-    // Assume the PCI Root Bridge supports DAC and Bus Master.
+    // Assume the PCI Root Bridge supports DAC
     //
     PciIoDevice->Supports |= (UINT64)(EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE |
                               EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM |
-                              EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE |
-                              EFI_PCI_IO_ATTRIBUTE_BUS_MASTER);
+                              EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE);
 
   } else {
 
@@ -1234,16 +1233,9 @@ DetermineDeviceAttribute (
     //
     Command = EFI_PCI_COMMAND_IO_SPACE     |
               EFI_PCI_COMMAND_MEMORY_SPACE |
+              EFI_PCI_COMMAND_BUS_MASTER   |
               EFI_PCI_COMMAND_VGA_PALETTE_SNOOP;
 
-    //
-    // Per PCI-to-PCI Bridge Architecture all PCI-to-PCI bridges are Bus Master capable.
-    // So only test the Bus Master capability for PCI devices.
-    //
-    if (!IS_PCI_BRIDGE(&PciIoDevice->Pci)) {
-      Command |= EFI_PCI_COMMAND_BUS_MASTER;
-    }
-
     BridgeControl = EFI_PCI_BRIDGE_CONTROL_ISA | EFI_PCI_BRIDGE_CONTROL_VGA | EFI_PCI_BRIDGE_CONTROL_VGA_16;
 
     //
@@ -1253,11 +1245,7 @@ DetermineDeviceAttribute (
 
     //
     // Set the supported attributes for specified PCI device
-    // Per PCI-to-PCI Bridge Architecture all PCI-to-PCI bridges are Bus Master capable.
     //
-    if (IS_PCI_BRIDGE(&PciIoDevice->Pci)) {
-      Command |= EFI_PCI_COMMAND_BUS_MASTER;
-    }
     PciSetDeviceAttribute (PciIoDevice, Command, BridgeControl, EFI_SET_SUPPORTS);
 
     //