devm_kzalloc() can return a NULL pointer on failure,but this
returned value in extcon_rtk_type_c_probe() is not checked.
Add NULL check in extcon_rtk_type_c_probe(), to handle kernel NULL
pointer dereference error.

Fixes: 8a590d7371f0 ("extcon: add Realtek DHC RTD SoC Type-C driver")
Signed-off-by: Charles Han <hanchunchao@inspur.com>
---
 drivers/extcon/extcon-rtk-type-c.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/extcon/extcon-rtk-type-c.c b/drivers/extcon/extcon-rtk-type-c.c
index 19a01e663733..2820c7e82481 100644
--- a/drivers/extcon/extcon-rtk-type-c.c
+++ b/drivers/extcon/extcon-rtk-type-c.c
@@ -1369,6 +1369,8 @@ static int extcon_rtk_type_c_probe(struct platform_device *pdev)
 	}
 
 	type_c->type_c_cfg = devm_kzalloc(dev, sizeof(*type_c_cfg), GFP_KERNEL);
+	if (!type_c->type_c_cfg)
+		return -ENOMEM;
 
 	memcpy(type_c->type_c_cfg, type_c_cfg, sizeof(*type_c_cfg));
 
-- 
2.31.1