KVStore greentea tests broken on some Cypress targets after #12385

[kyle-cypress]

Description of defect

Several storage tests fail on some Cypress targets with latest master. This appears to have been caused by #12385 (the same tests pass with a8fe831)

The failing tests are:

• features-storage-tests-kvstore-general_tests_phase_1
• features-storage-tests-kvstore-general_tests_phase_2

Targets tested and failing:

• CY8CPROTO_062_4343W
• CY8CKIT_062_WIFI_BT

Targets tested and passing:

• CY8CPROTO_063_BLE
  Note: this board does not have external QSPI flash and therefore implements KVStore using internal flash. The other two boards use external QSPI flash for kvstore.

Test log

Target(s) affected by this defect ?

CY8CPROTO_062_4343W
CY8CKIT_062_WIFI_BT
(Possibly others - I have not exhaustively tested all Cypress targets)

Toolchain(s) (name and version) displaying this defect ?

GCC 6.3.1

What version of Mbed-os are you using (tag or sha) ?

744889a

What version(s) of tools are you using. List all that apply (E.g. mbed-cli)

1.10.1

How is this defect reproduced ?

mbed test -t GCC_ARM -m CY8CPROTO_062_4343W -n *general_tests*

[jamesbeyond]

Hi @tymoteuszblochmobica,
Any ideas about this issue? this seems linked with #12385

[0xc0170]

@kyle-cypress Thanks for the report. I can confirm this is now also in nightly

@ARMmbed/mbed-os-storage

[ciarmcom]

Internal Jira reference: https://jira.arm.com/browse/MBOTRIAGE-2573

[tymoteuszblochmobica]

Im working on it

[tymoteuszblochmobica]

PR with fix
#12599