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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2009-03-14 08:28:45 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:22 -0300 |
| commit | ae6cfaace120f4330715b56265ce0e4a710e1276 (patch) | |
| tree | ed01c11218132e92ce8fe4872fe26c572c3c8842 /include/media/v4l2-device.h | |
| parent | 6273fda6e32e2cd9a478545d0cbc15ac497b1f4b (diff) | |
| download | lwn-ae6cfaace120f4330715b56265ce0e4a710e1276.tar.gz lwn-ae6cfaace120f4330715b56265ce0e4a710e1276.zip | |
V4L/DVB (11044): v4l2-device: add v4l2_device_disconnect
Call v4l2_device_disconnect when the parent of a hotpluggable device
disconnects. This ensures that you do not have a pointer to a device that
is no longer present.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include/media/v4l2-device.h')
| -rw-r--r-- | include/media/v4l2-device.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h index 3d8e96f6ceb3..0dd3e8e8653e 100644 --- a/include/media/v4l2-device.h +++ b/include/media/v4l2-device.h @@ -53,7 +53,11 @@ struct v4l2_device { dev may be NULL in rare cases (ISA devices). In that case you must fill in the v4l2_dev->name field before calling this function. */ int __must_check v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev); -/* Set v4l2_dev->dev->driver_data to NULL and unregister all sub-devices */ +/* Set v4l2_dev->dev to NULL. Call when the USB parent disconnects. + Since the parent disappears this ensures that v4l2_dev doesn't have an + invalid parent pointer. */ +void v4l2_device_disconnect(struct v4l2_device *v4l2_dev); +/* Unregister all sub-devices and any other resources related to v4l2_dev. */ void v4l2_device_unregister(struct v4l2_device *v4l2_dev); /* Register a subdev with a v4l2 device. While registered the subdev module |