regmap: Disable locking for RBTREE and MAPLE unit tests

REGCACHE_RBTREE and REGCACHE_MAPLE dynamically allocate memory
for regmap operations. This is incompatible with spinlock based locking
which is used for fast_io operations. Disable locking for the associated
unit tests to avoid lockdep splashes.

Fixes: f033c26 ("regmap: Add maple tree based register cache")
Fixes: 2238959 ("regmap: Add some basic kunit tests")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230720032848.1306349-1-linux@roeck-us.net
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/base/regmap/regmap-kunit.c

@@ -58,6 +58,9 @@ static struct regmap *gen_regmap(struct regmap_config *config,
 	int i;
 	struct reg_default *defaults;
 
+	config->disable_locking = config->cache_type == REGCACHE_RBTREE ||
+					config->cache_type == REGCACHE_MAPLE;
+
 	buf = kmalloc(size, GFP_KERNEL);
 	if (!buf)
 		return ERR_PTR(-ENOMEM);
@@ -889,6 +892,8 @@ static struct regmap *gen_raw_regmap(struct regmap_config *config,
 
 	config->cache_type = test_type->cache_type;
 	config->val_format_endian = test_type->val_endian;
+	config->disable_locking = config->cache_type == REGCACHE_RBTREE ||
+					config->cache_type == REGCACHE_MAPLE;
 
 	buf = kmalloc(size, GFP_KERNEL);
 	if (!buf)