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authorHans Verkuil <hverkuil@xs4all.nl>2010-09-26 11:16:56 (GMT)
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-10-21 03:06:14 (GMT)
commitd69f27186c16008540166c8017e9d4db2b477588 (patch)
tree5aad41d0b021e7544bf0aae30c44657e1afd3e45 /Documentation/video4linux
parent96322b80e29802d2d3087987f6dc4e5aa19df64b (diff)
downloadlinux-d69f27186c16008540166c8017e9d4db2b477588.tar.xz
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/video4linux')
-rw-r--r--Documentation/video4linux/v4l2-framework.txt5
1 files changed, 2 insertions, 3 deletions
diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt
index 8fb9de4..9b1d81c 100644
--- a/Documentation/video4linux/v4l2-framework.txt
+++ b/Documentation/video4linux/v4l2-framework.txt
@@ -551,9 +551,8 @@ from /dev).
After video_unregister_device() returns no new opens can be done. However,
in the case of USB devices some application might still have one of these
-device nodes open. So after the unregister all file operations will return
-an error as well, except for the ioctl and unlocked_ioctl file operations:
-those will still be passed on since some buffer ioctls may still be needed.
+device nodes open. So after the unregister all file operations (except
+release, of course) will return an error as well.
When the last user of the video device node exits, then the vdev->release()
callback is called and you can do the final cleanup there.