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-rw-r--r--MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHci.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHci.c b/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHci.c
index c251fbecb3..72efd56d48 100644
--- a/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHci.c
+++ b/MdeModulePkg/Bus/Sd/SdBlockIoPei/SdHci.c
@@ -2647,6 +2647,7 @@ SdPeimSetBusMode (
//
// Get the supported bus speed from SWITCH cmd return data group #1.
//
+ ZeroMem (SwitchResp, sizeof (SwitchResp));
Status = SdPeimSwitch (Slot, 0xF, 0xF, 0xF, 0xF, FALSE, SwitchResp);
if (EFI_ERROR (Status)) {
return Status;