[PATCH 1/4] test/py: Correctly restore the DT after capsule tests

[Ilias Apalodimas]

Some capsule tests are changing the sandbox DT to test various features,
e.g authenticated capsule updates, versioning support etc. However, no one
restores the original DT and the CI pops errors looking like

/u-boot
Bloblist at 100 not found (err=-2)
Failed to find FDT file '/tmp/sandbox/persistent-data/scratch/EFI/CapsuleTestData/test_ver.dtb'
initcall_run_f(): initcall fdtdec_setup() failed

if sandbox is restarted.

So let's restore the proper DT after done with the capsule testing.

Signed-off-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
---
 test/py/tests/test_efi_capsule/capsule_common.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/py/tests/test_efi_capsule/capsule_common.py b/test/py/tests/test_efi_capsule/capsule_common.py
index 04dabc176c4d..8c66411929e8 100644
--- a/test/py/tests/test_efi_capsule/capsule_common.py
+++ b/test/py/tests/test_efi_capsule/capsule_common.py
@@ -137,6 +137,8 @@ def do_reboot_dtb_specified(u_boot_config, ubman, dtb_filename):
         dtb_filename -- DTB file name.
     """
     mnt_point = u_boot_config.persistent_data_dir + '/scratch'
+    old_dtb = ubman.config.dtb
     ubman.config.dtb = mnt_point + CAPSULE_DATA_DIR \
                                 + f'/{dtb_filename}'
     ubman.restart_uboot()
+    ubman.config.dtb = old_dtb
-- 
2.49.0