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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 /drivers/media/video/v4l2-device.c | |
| parent | V4L/DVB (11042): v4l2-api: Add definitions for V4L2_MPEG_STREAM_VBI_FMT_IVTV payloads (diff) | |
| download | linux-dev-ae6cfaace120f4330715b56265ce0e4a710e1276.tar.xz linux-dev-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 'drivers/media/video/v4l2-device.c')
| -rw-r--r-- | drivers/media/video/v4l2-device.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c index b3dcb8454379..94aa485ade52 100644 --- a/drivers/media/video/v4l2-device.c +++ b/drivers/media/video/v4l2-device.c @@ -49,19 +49,26 @@ int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev) } EXPORT_SYMBOL_GPL(v4l2_device_register); +void v4l2_device_disconnect(struct v4l2_device *v4l2_dev) +{ + if (v4l2_dev->dev) { + dev_set_drvdata(v4l2_dev->dev, NULL); + v4l2_dev->dev = NULL; + } +} +EXPORT_SYMBOL_GPL(v4l2_device_disconnect); + void v4l2_device_unregister(struct v4l2_device *v4l2_dev) { struct v4l2_subdev *sd, *next; if (v4l2_dev == NULL) return; - if (v4l2_dev->dev) - dev_set_drvdata(v4l2_dev->dev, NULL); + v4l2_device_disconnect(v4l2_dev); + /* Unregister subdevs */ list_for_each_entry_safe(sd, next, &v4l2_dev->subdevs, list) v4l2_device_unregister_subdev(sd); - - v4l2_dev->dev = NULL; } EXPORT_SYMBOL_GPL(v4l2_device_unregister); |