[PATCH] regmap: Also protect hwspinlock in error handling path

[Mark Brown]

The previous patch to allow the hwspinlock code to be disabled missed
handling the free in the error path, do so using the better IS_ENABLED()
pattern as suggested by Baolin. While we're at it also check that we have
a hardware spinlock before freeing it - the core code reports an error
when freeing an invalid lock.

Suggested-by: Baolin Wang <baolin.wang@xxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 drivers/base/regmap/regmap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ff6ef6a579c6..5ff549fa880b 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1116,7 +1116,8 @@ struct regmap *__regmap_init(struct device *dev,
 	regmap_range_exit(map);
 	kfree(map->work_buf);
 err_hwlock:
-	hwspin_lock_free(map->hwlock);
+	if (IS_ENABLED(REGMAP_HWSPINLOCK) && map->hwlock)
+		hwspin_lock_free(map->hwlock);
 err_map:
 	kfree(map);
 err:
-- 
2.15.0