SecurityPkg: Remove enforcement of final GoIdle transition for CRB commands

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4077

Following the design described in the TCG specification,
the driver implementation of the CRB protocol does not require
enforcing completing the transition to goIdle at the end of a command
sequence.

Signed-off-by: Rodrigo Gonzalez Del Cueto <rodrigo.gonzalez.del.cueto@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>

1 files changed, 0 insertions, 13 deletions

diff --git a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
index 840265292a..1f9ac5ab5a 100644
--- a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
+++ b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
@@ -381,19 +381,6 @@ GoIdle_Exit:
   //

   MmioWrite32 ((UINTN)&CrbReg->CrbControlRequest, PTP_CRB_CONTROL_AREA_REQUEST_GO_IDLE);

 

-  //

-  // Only enforce Idle state transition if execution fails when CRBIdleBypass==1

-  // Leave regular Idle delay at the beginning of next command execution

-  //

-  if (GetCachedIdleByPass () == 1) {

-    Status = PtpCrbWaitRegisterBits (

-               &CrbReg->CrbControlStatus,

-               PTP_CRB_CONTROL_AREA_STATUS_TPM_IDLE,

-               0,

-               PTP_TIMEOUT_C

-               );

-  }

-

   return Status;

 }