linux-kernel - [PATCH] media: saa7146: fix error logic at saa7146_vv

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Date:   Tue, 14 Dec 2021 14:54:26 +0100
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: [PATCH] media: saa7146: fix error logic at saa7146_vv_init()

As the first thing this function does is to call
v4l2_device_register(), it should call v4l2_device_unregister()
if an error occurs, the same way as done at saa7146_vv_release().

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 drivers/media/common/saa7146/saa7146_fops.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/common/saa7146/saa7146_fops.c b/drivers/media/common/saa7146/saa7146_fops.c
index be3215977714..e9a15de6126e 100644
--- a/drivers/media/common/saa7146/saa7146_fops.c
+++ b/drivers/media/common/saa7146/saa7146_fops.c
@@ -487,6 +487,7 @@ int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 	if (hdl->error) {
 		err = hdl->error;
 		v4l2_ctrl_handler_free(hdl);
+		v4l2_device_unregister(&dev->v4l2_dev);
 		return err;
 	}
 	dev->v4l2_dev.ctrl_handler = hdl;
@@ -495,6 +496,7 @@ int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 	if (vv == NULL) {
 		ERR("out of memory. aborting.\n");
 		v4l2_ctrl_handler_free(hdl);
+		v4l2_device_unregister(&dev->v4l2_dev);
 		return -ENOMEM;
 	}
 	ext_vv->vid_ops = saa7146_video_ioctl_ops;
@@ -521,6 +523,7 @@ int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 		ERR("out of memory. aborting.\n");
 		kfree(vv);
 		v4l2_ctrl_handler_free(hdl);
+		v4l2_device_unregister(&dev->v4l2_dev);
 		return -ENOMEM;
 	}
 
-- 
2.33.1