From ace1fea64eab79d98ead58eb795f3e448a8fc682 Mon Sep 17 00:00:00 2001
From: Aidan Garske <aidan@wolfssl.com>
Date: Tue, 8 Sep 2026 11:27:51 -0700
Subject: [PATCH] F-13459 - End the U-Boot SPI transaction after a failed
 header transfer

---
 hal/tpm_io_uboot.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hal/tpm_io_uboot.c b/hal/tpm_io_uboot.c
index 56440261..898774d2 100644
--- a/hal/tpm_io_uboot.c
+++ b/hal/tpm_io_uboot.c
@@ -148,6 +148,10 @@
         #ifdef DEBUG_WOLFTPM
             printf("wolfTPM: SPI header xfer failed: %d\n", ret);
         #endif
+            /* End the transaction so a driver that holds CS does not leave
+             * it active for the next request */
+            spi_xfer(g_spi_slave, 0, NULL, NULL, SPI_XFER_END);
+            ret = TPM_RC_FAILURE;
             goto cleanup;
         }