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V4L/DVB (13552): v4l: Replace video_is_unregistered with video_is_registered

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Replace the video_is_unregistered function by a video_is_registered
function. The V4L2_FL_UNREGISTERED flag is replaced by a
V4L2_FL_REGISTERED flag.

This change makes the video_is_registered function return coherent
results when called on an initialize but not yet registered video_device
instance. The function can now be used instead of checking
video_device::minor.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2009-11-27 13:57:22 -03:00 • committed by Mauro Carvalho Chehab
parent 0fda5d4420
commit 957b4aa9f7
3 changed files with 18 additions and 20 deletions
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18
include/media/v4l2-dev.h
View file

@ -28,10 +28,10 @@ struct v4l2_ioctl_callbacks;
struct video_device;
struct v4l2_device;
/* Flag to mark the video_device struct as unregistered.
Drivers can set this flag if they want to block all future
device access. It is set by video_unregister_device. */
#define V4L2_FL_UNREGISTERED (0)
/* Flag to mark the video_device struct as registered.
Drivers can clear this flag if they want to block all future
device access. It is cleared by video_unregister_device. */
#define V4L2_FL_REGISTERED (0)
struct v4l2_file_operations {
struct module *owner;
@ -96,9 +96,7 @@ struct video_device
/* Register video devices. Note that if video_register_device fails,
the release() callback of the video_device structure is *not* called, so
the caller is responsible for freeing any data. Usually that means that
you call video_device_release() on failure.
Also note that vdev->minor is set to -1 if the registration failed. */
you call video_device_release() on failure. */
int __must_check video_register_device(struct video_device *vdev, int type, int nr);
/* Same as video_register_device, but no warning is issued if the desired
@ -106,7 +104,7 @@ int __must_check video_register_device(struct video_device *vdev, int type, int
int __must_check video_register_device_no_warn(struct video_device *vdev, int type, int nr);
/* Unregister video devices. Will do nothing if vdev == NULL or
vdev->minor < 0. */
video_is_registered() returns false. */
void video_unregister_device(struct video_device *vdev);
/* helper functions to alloc/release struct video_device, the
@ -146,9 +144,9 @@ static inline const char *video_device_node_name(struct video_device *vdev)
return dev_name(&vdev->dev);
}
static inline int video_is_unregistered(struct video_device *vdev)
static inline int video_is_registered(struct video_device *vdev)
{
return test_bit(V4L2_FL_UNREGISTERED, &vdev->flags);
return test_bit(V4L2_FL_REGISTERED, &vdev->flags);
}
#endif /* _V4L2_DEV_H */