diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
index 8dd7a8fbb7..461b2cd9b5 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
@@ -405,7 +405,7 @@ XhcGetRootHubPortStatus (
   // Section 7.2 xHCI Support Protocol Capability
   //
   if (PortSpeed > 0) {
-    PortStatus->PortStatus = XhcCheckUsbPortSpeedUsedPsic (Xhc, PortSpeed);
+    PortStatus->PortStatus = XhcCheckUsbPortSpeedUsedPsic (Xhc, PortSpeed, PortNumber);
     // If no match found in ext cap reg, fall back to PORTSC
     if (PortStatus->PortStatus == 0) {
       //
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c
index 2b4a4b2444..5700fc5fb8 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c
@@ -636,6 +636,7 @@ XhcGetSupportedProtocolCapabilityAddr (
   @param  Xhc            The XHCI Instance.
   @param  ExtCapOffset   The USB Major Version in xHCI Support Protocol Capability Field
   @param  PortSpeed      The Port Speed Field in USB PortSc register
+  @param  PortNumber     The Port Number (0-indexed)
 
   @return The Protocol Speed ID (PSI) from xHCI Supported Protocol capability register.
 
@@ -644,12 +645,15 @@ UINT32
 XhciPsivGetPsid (
   IN USB_XHCI_INSTANCE  *Xhc,
   IN UINT32             ExtCapOffset,
-  IN UINT8              PortSpeed
+  IN UINT8              PortSpeed,
+  IN UINT8              PortNumber
   )
 {
   XHC_SUPPORTED_PROTOCOL_DW2                PortId;
   XHC_SUPPORTED_PROTOCOL_PROTOCOL_SPEED_ID  Reg;
   UINT32                                    Count;
+  UINT32                                    MinPortIndex;
+  UINT32                                    MaxPortIndex;
 
   if ((Xhc == NULL) || (ExtCapOffset == 0xFFFFFFFF)) {
     return 0;
@@ -663,6 +667,23 @@ XhciPsivGetPsid (
   //
   PortId.Dword = XhcReadExtCapReg (Xhc, ExtCapOffset + XHC_SUPPORTED_PROTOCOL_DW2_OFFSET);
 
+  //
+  // According to XHCI 1.1 spec November 2017, valid values
+  // for CompPortOffset are 1 to CompPortCount - 1.
+  //
+  // PortNumber is zero-indexed, so subtract 1.
+  //
+  if ((PortId.Data.CompPortOffset == 0) || (PortId.Data.CompPortCount == 0)) {
+    return 0;
+  }
+
+  MinPortIndex = PortId.Data.CompPortOffset - 1;
+  MaxPortIndex = MinPortIndex + PortId.Data.CompPortCount - 1;
+
+  if ((PortNumber < MinPortIndex) || (PortNumber > MaxPortIndex)) {
+    return 0;
+  }
+
   for (Count = 0; Count < PortId.Data.Psic; Count++) {
     Reg.Dword = XhcReadExtCapReg (Xhc, ExtCapOffset + XHC_SUPPORTED_PROTOCOL_PSI_OFFSET + (Count << 2));
     if (Reg.Data.Psiv == PortSpeed) {
@@ -676,8 +697,9 @@ XhciPsivGetPsid (
 /**
   Find PortSpeed value match case in XHCI Supported Protocol Capability
 
-  @param  Xhc        The XHCI Instance.
-  @param  PortSpeed  The Port Speed Field in USB PortSc register
+  @param  Xhc         The XHCI Instance.
+  @param  PortSpeed   The Port Speed Field in USB PortSc register
+  @param  PortNumber  The Port Number (0-indexed)
 
   @return The USB Port Speed.
 
@@ -685,7 +707,8 @@ XhciPsivGetPsid (
 UINT16
 XhcCheckUsbPortSpeedUsedPsic (
   IN USB_XHCI_INSTANCE  *Xhc,
-  IN UINT8              PortSpeed
+  IN UINT8              PortSpeed,
+  IN UINT8              PortNumber
   )
 {
   XHC_SUPPORTED_PROTOCOL_PROTOCOL_SPEED_ID  SpField;
@@ -703,7 +726,7 @@ XhcCheckUsbPortSpeedUsedPsic (
   // PortSpeed definition when the Major Revision is 03h.
   //
   if (Xhc->Usb3SupOffset != 0xFFFFFFFF) {
-    SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb3SupOffset, PortSpeed);
+    SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb3SupOffset, PortSpeed, PortNumber);
     if (SpField.Dword != 0) {
       //
       // Found the corresponding PORTSC value in PSIV field of USB3 offset.
@@ -717,7 +740,7 @@ XhcCheckUsbPortSpeedUsedPsic (
   // PortSpeed definition when the Major Revision is 02h.
   //
   if ((UsbSpeedIdMap == 0) && (Xhc->Usb2SupOffset != 0xFFFFFFFF)) {
-    SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb2SupOffset, PortSpeed);
+    SpField.Dword = XhciPsivGetPsid (Xhc, Xhc->Usb2SupOffset, PortSpeed, PortNumber);
     if (SpField.Dword != 0) {
       //
       // Found the corresponding PORTSC value in PSIV field of USB2 offset.
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
index 5fe2ba4f0e..63bcae8974 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
@@ -621,10 +621,11 @@ XhcGetSupportedProtocolCapabilityAddr (
   );
 
 /**
-  Find SpeedField value match with Port Speed ID value.
+  Find PortSpeed value match case in XHCI Supported Protocol Capability
 
-  @param  Xhc    The XHCI Instance.
-  @param  Speed  The Port Speed filed in USB PortSc register
+  @param  Xhc         The XHCI Instance.
+  @param  PortSpeed   The Port Speed Field in USB PortSc register
+  @param  PortNumber  The Port Number (0-indexed)
 
   @return The USB Port Speed.
 
@@ -632,7 +633,8 @@ XhcGetSupportedProtocolCapabilityAddr (
 UINT16
 XhcCheckUsbPortSpeedUsedPsic (
   IN USB_XHCI_INSTANCE  *Xhc,
-  IN UINT8              Speed
+  IN UINT8              PortSpeed,
+  IN UINT8              PortNumber
   );
 
 #endif