[U-Boot] ut dm pch sandbox test failures

[Stephen Warren]

On 2/21/19 4:45 PM, Stephen Warren wrote:
> With the latest push to u-boot.git master branch, I'm seeing the 
> following failures running test/py on sandbox:
> 
> => ut dm pch_base
> Test: dm_test_pch_base: pch.c
> /var/lib/jenkins/workspace/u-boot-denx_uboot-master-build/src/u-boot/test/dm/pch.c:20, 
> dm_test_pch_base(): 0 == uclass_first_device_err(UCLASS_PCH, &dev): 
> Expected 0, got -19
> Test: dm_test_pch_base: pch.c (flat tree)
> /var/lib/jenkins/workspace/u-boot-denx_uboot-master-build/src/u-boot/test/dm/pch.c:20, 
> dm_test_pch_base(): 0 == uclass_first_device_err(UCLASS_PCH, &dev): 
> Expected 0, got -19
> Failures: 2
> 
> => ut dm pch_ioctl
> Test: dm_test_pch_ioctl: pch.c
> /var/lib/jenkins/workspace/u-boot-denx_uboot-master-build/src/u-boot/test/dm/pch.c:44, 
> dm_test_pch_ioctl(): 0 == uclass_first_device_err(UCLASS_PCH, &dev): 
> Expected 0, got -19
> Test: dm_test_pch_ioctl: pch.c (flat tree)
> /var/lib/jenkins/workspace/u-boot-denx_uboot-master-build/src/u-boot/test/dm/pch.c:44, 
> dm_test_pch_ioctl(): 0 == uclass_first_device_err(UCLASS_PCH, &dev): 
> Expected 0, got -19
> Failures: 2

This is some kind of incremental build problem; I deleted the build 
results and retriggered Jenkins and everything worked fine. The exact 
same issue and solution appeared and worked in two separate branches 
that I test (u-boot.git master, u-boot-video.git master). Subsequently I 
found that the following works fine:

rm -rf build-sandbox/
git checkout 888f9aa5cac4
./test/py/test.py --bd sandbox --build -k test_ut

But the following reproduces the problem:

rm -rf build-sandbox/
git checkout 97f9830849c6
./test/py/test.py --bd sandbox --build -k test_ut
git checkout 888f9aa5cac4
./test/py/test.py --bd sandbox --build -k test_ut