MdeModulePkg: Skip invalid bus number scanning in PciBusDxe driver

[mirror_edk2.git] / MdeModulePkg / Bus / Pci / PciBusDxe / PciEnumeratorSupport.c

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
index a6ade26e3a09786970dc0a46fc0684d8e3c76a0a..086c481130c8363728ae91f3ac30a7b5260e65cc 100644 (file)
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
@@ -164,6 +164,14 @@ PciPciDeviceInfoCollector (
             return Status;\r
           }\r
 \r
+          //\r
+          // Ensure secondary bus number is greater than the primary bus number to avoid\r
+          // any potential dead loop when PcdPciDisableBusEnumeration is set to TRUE\r
+          //\r
+          if (SecBus <= StartBusNumber) {\r
+            break;\r
+          }\r
+\r
           //\r
           // Get resource padding for PPB\r
           //\r