diff options
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-dev.c | 34 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ioctl.c | 7 | ||||
| -rw-r--r-- | include/media/v4l2-dev.h | 4 |
3 files changed, 18 insertions, 27 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index 0c061e16502e..c8859d6ff6ad 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -495,8 +495,8 @@ static const struct file_operations v4l2_fops = { }; /** - * get_index - assign stream index number based on parent device - * @vdev: video_device to assign index number to, vdev->parent should be assigned + * get_index - assign stream index number based on v4l2_dev + * @vdev: video_device to assign index number to, vdev->v4l2_dev should be assigned * * Note that when this is called the new device has not yet been registered * in the video_device array, but it was able to obtain a minor number. @@ -514,15 +514,11 @@ static int get_index(struct video_device *vdev) static DECLARE_BITMAP(used, VIDEO_NUM_DEVICES); int i; - /* Some drivers do not set the parent. In that case always return 0. */ - if (vdev->parent == NULL) - return 0; - bitmap_zero(used, VIDEO_NUM_DEVICES); for (i = 0; i < VIDEO_NUM_DEVICES; i++) { if (video_device[i] != NULL && - video_device[i]->parent == vdev->parent) { + video_device[i]->v4l2_dev == vdev->v4l2_dev) { set_bit(video_device[i]->index, used); } } @@ -775,6 +771,9 @@ int __video_register_device(struct video_device *vdev, int type, int nr, /* the release callback MUST be present */ if (WARN_ON(!vdev->release)) return -EINVAL; + /* the v4l2_dev pointer MUST be present */ + if (WARN_ON(!vdev->v4l2_dev)) + return -EINVAL; /* v4l2_fh support */ spin_lock_init(&vdev->fh_lock); @@ -802,16 +801,14 @@ int __video_register_device(struct video_device *vdev, int type, int nr, vdev->vfl_type = type; vdev->cdev = NULL; - if (vdev->v4l2_dev) { - if (vdev->v4l2_dev->dev) - vdev->parent = vdev->v4l2_dev->dev; - if (vdev->ctrl_handler == NULL) - vdev->ctrl_handler = vdev->v4l2_dev->ctrl_handler; - /* If the prio state pointer is NULL, then use the v4l2_device - prio state. */ - if (vdev->prio == NULL) - vdev->prio = &vdev->v4l2_dev->prio; - } + if (vdev->dev_parent == NULL) + vdev->dev_parent = vdev->v4l2_dev->dev; + if (vdev->ctrl_handler == NULL) + vdev->ctrl_handler = vdev->v4l2_dev->ctrl_handler; + /* If the prio state pointer is NULL, then use the v4l2_device + prio state. */ + if (vdev->prio == NULL) + vdev->prio = &vdev->v4l2_dev->prio; /* Part 2: find a free minor, device node number and device index. */ #ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES @@ -896,8 +893,7 @@ int __video_register_device(struct video_device *vdev, int type, int nr, /* Part 4: register the device with sysfs */ vdev->dev.class = &video_class; vdev->dev.devt = MKDEV(VIDEO_MAJOR, vdev->minor); - if (vdev->parent) - vdev->dev.parent = vdev->parent; + vdev->dev.parent = vdev->dev_parent; dev_set_name(&vdev->dev, "%s%d", name_base, vdev->num); ret = device_register(&vdev->dev); if (ret < 0) { diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index c9d9f01d21bc..68e6b5e912ff 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1813,12 +1813,7 @@ static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, p->flags |= V4L2_CHIP_FL_WRITABLE; if (ops->vidioc_g_register) p->flags |= V4L2_CHIP_FL_READABLE; - if (vfd->v4l2_dev) - strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); - else if (vfd->parent) - strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name)); - else - strlcpy(p->name, "bridge", sizeof(p->name)); + strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); if (ops->vidioc_g_chip_info) return ops->vidioc_g_chip_info(file, fh, arg); if (p->match.addr) diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index b2c3776a1cff..c768c9f8abc2 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -96,9 +96,9 @@ struct video_device struct device dev; /* v4l device */ struct cdev *cdev; /* character device */ - /* Set either parent or v4l2_dev if your driver uses v4l2_device */ - struct device *parent; /* device parent */ struct v4l2_device *v4l2_dev; /* v4l2_device parent */ + /* Only set parent if that can't be deduced from v4l2_dev */ + struct device *dev_parent; /* device parent */ /* Control handler associated with this device node. May be NULL. */ struct v4l2_ctrl_handler *ctrl_handler; |