diff options
| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2019-08-15 09:36:49 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-12-02 15:55:44 +0100 |
| commit | 989bea48915861171421bd6e1367bf4c9407513d (patch) | |
| tree | 7b920aa000b8c970efe5ff2c3c0c3d74cfd233ea /drivers/media/v4l2-core | |
| parent | 7daaf0bc24ad81ec13b444a047cf4f66827ba96e (diff) | |
media: v4l: subdev: Set sd->devnode before registering the subdev
The subdev's video device node was only assigned after registering the
device node in the system. While it is unlikely that a driver needed to
use this field in handling system calls to its file handle, there remains
a slim chance the devnode field remains NULL while the driver expects to
find a video node there.
Assign the devnode field before registering the device, and assign it back
to NULL if the registration failed.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-device.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-device.c b/drivers/media/v4l2-core/v4l2-device.c index de4287251a89..d2e58ae91f9b 100644 --- a/drivers/media/v4l2-core/v4l2-device.c +++ b/drivers/media/v4l2-core/v4l2-device.c @@ -218,13 +218,14 @@ int __v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev, vdev->ctrl_handler = sd->ctrl_handler; if (read_only) set_bit(V4L2_FL_SUBDEV_RO_DEVNODE, &vdev->flags); + sd->devnode = vdev; err = __video_register_device(vdev, VFL_TYPE_SUBDEV, -1, 1, sd->owner); if (err < 0) { + sd->devnode = NULL; kfree(vdev); goto clean_up; } - sd->devnode = vdev; #if defined(CONFIG_MEDIA_CONTROLLER) sd->entity.info.dev.major = VIDEO_MAJOR; sd->entity.info.dev.minor = vdev->minor; |