regmap: Hold the regmap lock when allocating and freeing the cache

For the benefit of the maple tree's lockdep checking hold the lock while
creating and exiting the cache.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/20240822-b4-regmap-maple-nolock-v1-2-d5e6dbae3396@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/base/regmap/regcache.c

@@ -195,7 +195,9 @@ int regcache_init(struct regmap *map, const struct regmap_config *config)
 	if (map->cache_ops->init) {
 		dev_dbg(map->dev, "Initializing %s cache\n",
 			map->cache_ops->name);
+		map->lock(map->lock_arg);
 		ret = map->cache_ops->init(map);
+		map->unlock(map->lock_arg);
 		if (ret)
 			goto err_free;
 	}
@@ -223,7 +225,9 @@ void regcache_exit(struct regmap *map)
 	if (map->cache_ops->exit) {
 		dev_dbg(map->dev, "Destroying %s cache\n",
 			map->cache_ops->name);
+		map->lock(map->lock_arg);
 		map->cache_ops->exit(map);
+		map->unlock(map->lock_arg);
 	}
 }
 

drivers/base/regmap/regmap.c

@@ -1445,6 +1445,7 @@ void regmap_exit(struct regmap *map)
 	struct regmap_async *async;
 
 	regcache_exit(map);
+
 	regmap_debugfs_exit(map);
 	regmap_range_exit(map);
 	if (map->bus && map->bus->free_context)