regmap: Remove debugfs before cache teardown

Browse source

regmap_exit() and regmap_reinit_cache() destroy the register cache before
removing debugfs. A concurrent debugfs cache operation can therefore
access cache state after the backend exit callback starts freeing it.

Remove debugfs before cache teardown, and clear the debugfs pointer after
removal. During cache reinitialization, recreate debugfs only after the
new cache initializes successfully.

Signed-off-by: Michael Reeves <michael.reeves077@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://patch.msgid.link/20261006-regcache-lifecycle-submit-v3-1-37bdd82fd47c@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

...

This commit is contained in:

Michael Reeves 2026-10-06 18:03:15 +11:00 • committed by Mark Brown

parent 24a19b953e

commit 834035934c

No known key found for this signature in database

GPG key ID: 2FEF73B0B3D03889

2 changed files with 10 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/base/regmap/regmap-debugfs.c

View file

15

drivers/base/regmap/regmap.c

View file