[PATCH -next] gpio: sim: fix missing unlock on error in gpio_sim_config_commit_item()

[Wei Yongjun <weiyongjun1@xxxxxxxxxx>]

Add the missing unlock before return from function
gpio_sim_config_commit_item() in the error handling
case.

Fixes: b48f6b466e44 ("gpio: sim: new testing module")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/gpio/gpio-sim.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index d8bf84b604d9..e2113092f85b 100644
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -789,8 +789,10 @@ static int gpio_sim_config_commit_item(struct config_item *item)
 						config->num_line_names);
 
 	fwnode = fwnode_create_software_node(properties, NULL);
-	if (IS_ERR(fwnode))
+	if (IS_ERR(fwnode)) {
+		mutex_unlock(&config->lock);
 		return PTR_ERR(fwnode);
+	}
 
 	pdevinfo.name = "gpio-sim";
 	pdevinfo.fwnode = fwnode;