From cbb77ae4309c5c0d651ff8240ce02929fa020eab Mon Sep 17 00:00:00 2001
From: Cai YiWei <cyw@rock-chips.com>
Date: Wed, 17 Jul 2019 11:33:42 +0800
Subject: [PATCH] media: rk1608: fix null pointer that no sensor to rk1608

Change-Id: Ida61fd89ad39f641b7add61873a0d0fe05ca66f7
Signed-off-by: Cai YiWei <cyw@rock-chips.com>
---
 drivers/media/spi/rk1608.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/spi/rk1608.c b/drivers/media/spi/rk1608.c
index 6430542118a7..d9097ae0d56b 100644
--- a/drivers/media/spi/rk1608.c
+++ b/drivers/media/spi/rk1608.c
@@ -1088,6 +1088,11 @@ static int rk1608_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 			     struct rk1608_state, ctrl_handler);
 	int id = pdata->sd.grp_id;
 
+	if (!pdata->sensor[id]) {
+		dev_err(pdata->dev, "Did not find a sensor[%d]!\n", id);
+		return -EINVAL;
+	}
+
 	remote_ctrl = v4l2_ctrl_find(pdata->sensor[id]->ctrl_handler,
 				     ctrl->id);
 	if (remote_ctrl) {