diff options
Diffstat (limited to 'drivers/media/video/v4l2-dev.c')
| -rw-r--r-- | drivers/media/video/v4l2-dev.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 498e6742579..19d5ae29378 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -352,6 +352,23 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return ret; } +#ifdef CONFIG_MMU +#define v4l2_get_unmapped_area NULL +#else +static unsigned long v4l2_get_unmapped_area(struct file *filp, + unsigned long addr, unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + struct video_device *vdev = video_devdata(filp); + + if (!vdev->fops->get_unmapped_area) + return -ENOSYS; + if (!video_is_registered(vdev)) + return -ENODEV; + return vdev->fops->get_unmapped_area(filp, addr, len, pgoff, flags); +} +#endif + static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm) { struct video_device *vdev = video_devdata(filp); @@ -389,7 +406,8 @@ static int v4l2_open(struct inode *inode, struct file *filp) video_get(vdev); mutex_unlock(&videodev_lock); #if defined(CONFIG_MEDIA_CONTROLLER) - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev) { + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev && + vdev->vfl_type != VFL_TYPE_SUBDEV) { entity = media_entity_get(&vdev->entity); if (!entity) { ret = -EBUSY; @@ -415,7 +433,8 @@ err: /* decrease the refcount in case of an error */ if (ret) { #if defined(CONFIG_MEDIA_CONTROLLER) - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev) + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev && + vdev->vfl_type != VFL_TYPE_SUBDEV) media_entity_put(entity); #endif video_put(vdev); @@ -437,7 +456,8 @@ static int v4l2_release(struct inode *inode, struct file *filp) mutex_unlock(vdev->lock); } #if defined(CONFIG_MEDIA_CONTROLLER) - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev) + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev && + vdev->vfl_type != VFL_TYPE_SUBDEV) media_entity_put(&vdev->entity); #endif /* decrease the refcount unconditionally since the release() @@ -451,6 +471,7 @@ static const struct file_operations v4l2_fops = { .read = v4l2_read, .write = v4l2_write, .open = v4l2_open, + .get_unmapped_area = v4l2_get_unmapped_area, .mmap = v4l2_mmap, .unlocked_ioctl = v4l2_ioctl, #ifdef CONFIG_COMPAT @@ -686,7 +707,8 @@ int __video_register_device(struct video_device *vdev, int type, int nr, #if defined(CONFIG_MEDIA_CONTROLLER) /* Part 5: Register the entity. */ - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev) { + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev && + vdev->vfl_type != VFL_TYPE_SUBDEV) { vdev->entity.type = MEDIA_ENT_T_DEVNODE_V4L; vdev->entity.name = vdev->name; vdev->entity.v4l.major = VIDEO_MAJOR; @@ -733,7 +755,8 @@ void video_unregister_device(struct video_device *vdev) return; #if defined(CONFIG_MEDIA_CONTROLLER) - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev) + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev && + vdev->vfl_type != VFL_TYPE_SUBDEV) media_device_unregister_entity(&vdev->entity); #endif |