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-rw-r--r--ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c b/ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c
index 99335f05c5..38559571c2 100644
--- a/ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c
+++ b/ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c
@@ -2885,6 +2885,7 @@ ShellCommandRunPci (
);
ExtendedConfigSpace = NULL;
+ ExtendedConfigSize = 0;
PcieCapabilityPtr = LocatePciCapability (&ConfigSpace, EFI_PCI_CAPABILITY_ID_PCIEXP);
if (PcieCapabilityPtr != 0) {
ExtendedConfigSize = 0x1000 - EFI_PCIE_CAPABILITY_BASE_OFFSET;
@@ -2922,7 +2923,7 @@ ShellCommandRunPci (
//
if (ExplainData) {
PciExplainPci (&ConfigSpace, Address, IoDev);
- if ((PcieCapabilityPtr != 0) && !ShellGetExecutionBreakFlag ()) {
+ if ((ExtendedConfigSpace != NULL) && !ShellGetExecutionBreakFlag ()) {
PciExplainPciExpress (
(PCI_CAPABILITY_PCIEXP *) ((UINT8 *) &ConfigSpace + PcieCapabilityPtr),
ExtendedConfigSpace,