[PATCH v5 0/2] regcache: Avoid accessing non-initialised cache

From: Andy Shevchenko

Date: Tue Mar 03 2026 - 04:28:42 EST


Refactor regcache flow that populates cache on initialisation phase
based on the values in HW. This makes code robust against any possible
accesses to not-fully initialised caches.

Changelog v5:
- added a precursor patch to make things clearer
- also put the freeing resources into an order (Mark)
- dropped applied patches

v4: 20260302095847.2310066-1-andriy.shevchenko@xxxxxxxxxxxxxxx

Changelog v4:
- made conditional against 'count' to make it less dependent to the previous code path

v3: 20260226135918.381979-1-andriy.shevchenko@xxxxxxxxxxxxxxx

Changelog v3:
- dropped unneeded churn in patch 3 (Mark)
- fixed code to pass kunit test cases (Mark)

v2: 20260225161659.3811671-1-andriy.shevchenko@xxxxxxxxxxxxxxx

Changelog v2:
- rebased on top of the latest regmap changes (Mark)
- added two more little cleanups (patches 4 & 5)

Andy Shevchenko (2):
regcache: Factor out regcache_hw_exit() helper
regcache: Move HW readback after cache initialisation

drivers/base/regmap/regcache.c | 46 +++++++++++++++++++++-------------
1 file changed, 29 insertions(+), 17 deletions(-)

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2.50.1