diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2010-09-26 07:16:56 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-10-20 23:06:14 -0400 |
| commit | d69f27186c16008540166c8017e9d4db2b477588 (patch) | |
| tree | 5aad41d0b021e7544bf0aae30c44657e1afd3e45 /Documentation | |
| parent | 96322b80e29802d2d3087987f6dc4e5aa19df64b (diff) | |
V4L/DVB: v4l2-dev: after a disconnect any ioctl call will be blocked
Until now all fops except release and (unlocked_)ioctl returned an error
after the device node was unregistered. Extend this as well to the ioctl
fops. There is nothing useful that an application can do here and it
complicates the driver code unnecessarily.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/video4linux/v4l2-framework.txt | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt index 8fb9de4f4875..9b1d81c26b7d 100644 --- a/Documentation/video4linux/v4l2-framework.txt +++ b/Documentation/video4linux/v4l2-framework.txt | |||
| @@ -551,9 +551,8 @@ from /dev). | |||
| 551 | 551 | ||
| 552 | After video_unregister_device() returns no new opens can be done. However, | 552 | After video_unregister_device() returns no new opens can be done. However, |
| 553 | in the case of USB devices some application might still have one of these | 553 | in the case of USB devices some application might still have one of these |
| 554 | device nodes open. So after the unregister all file operations will return | 554 | device nodes open. So after the unregister all file operations (except |
| 555 | an error as well, except for the ioctl and unlocked_ioctl file operations: | 555 | release, of course) will return an error as well. |
| 556 | those will still be passed on since some buffer ioctls may still be needed. | ||
| 557 | 556 | ||
| 558 | When the last user of the video device node exits, then the vdev->release() | 557 | When the last user of the video device node exits, then the vdev->release() |
| 559 | callback is called and you can do the final cleanup there. | 558 | callback is called and you can do the final cleanup there. |