[PATCH v2] media: hi846: Fix memleak in hi846_init_controls()

From: Wei Chen
Date: Sun Mar 26 2023 - 05:27:36 EST


hi846_init_controls doesn't clean the allocated ctrl_hdlr
in case there is a failure, which causes memleak. Add
v4l2_ctrl_handler_free to free the resource properly.

Signed-off-by: Wei Chen <harperchen1110@xxxxxxxxx>
---
Changes in v2:
- move v4l2_ctrl_handler_free to error tag
- handle memleak in other failure positions

drivers/media/i2c/hi846.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/hi846.c b/drivers/media/i2c/hi846.c
index 7c61873b7198..f86997a261f5 100644
--- a/drivers/media/i2c/hi846.c
+++ b/drivers/media/i2c/hi846.c
@@ -1472,21 +1472,26 @@ static int hi846_init_controls(struct hi846 *hi846)
if (ctrl_hdlr->error) {
dev_err(&client->dev, "v4l ctrl handler error: %d\n",
ctrl_hdlr->error);
- return ctrl_hdlr->error;
+ ret = ctrl_hdlr->error;
+ goto error;
}

ret = v4l2_fwnode_device_parse(&client->dev, &props);
if (ret)
- return ret;
+ goto error;

ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &hi846_ctrl_ops,
&props);
if (ret)
- return ret;
+ goto error;

hi846->sd.ctrl_handler = ctrl_hdlr;

return 0;
+
+error:
+ v4l2_ctrl_handler_free(ctrl_hdlr);
+ return ret;
}

static int hi846_set_video_mode(struct hi846 *hi846, int fps)
--
2.25.1