[PATCH] fix: mfd: of_syscon_register: fix reset_control reference leak on success path

[WenTao Liang <vulab@iscas.ac.cn>]

of_reset_control_get_optional_exclusive acquires a reset control
  reference. On the success path, the function stores regmap and np but
  does not store or release the reset handle. Only error paths call
  reset_control_put to release it. This leaks the reset control reference
  on the success path.

Store the reset handle in syscon->reset so it can be properly managed.

Cc: stable@vger.kernel.org
Fixes: 7d1e3bd94828 ("mfd: syscon: Allow reset control for syscon devices")
Signed-off-by: WenTao Liang <vulab@iscas.ac.cn>
---
 drivers/mfd/syscon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 21a7fcdd2737..28576a3c02fd 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -148,6 +148,7 @@ static struct syscon *of_syscon_register(struct device_node *np, bool check_res)
 
 	syscon->regmap = regmap;
 	syscon->np = np;
+	syscon->reset = reset;
 
 	list_add_tail(&syscon->list, &syscon_list);
 
-- 
2.39.5 (Apple Git-154)