regmap: debugfs: Use guard to simplify code

Replace open-coded mutex_lock()/unlock() pairs with guard() and
scoped_guard() across the debugfs code.

 - regmap_debugfs_get_dump_start(): guard(mutex) replaces three
   unlock sites (kzalloc failure, cache hit, end-of-function).

 - regmap_next_readable_reg(): early return for the common case
   and scoped_guard for the cache fallback path.

 - regmap_reg_ranges_read_file(): scoped_guard wraps the cache
   iteration loop.

 - regmap_debugfs_init(): scoped_guard for single list_add.

 - regmap_debugfs_exit(): flatten if/else into early return and
   scoped_guard for the early-list cleanup.

 - regmap_debugfs_initcall(): guard(mutex) held to function end.

No functional change.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://patch.msgid.link/20261002-regmap-lock-2nd-v2-7-e172b0501c52@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

0 files changed, 0 insertions, 0 deletions