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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-14 12:28:45 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-14 12:28:45 +0100 |
| commit | 48beb6bb3e66daddf4c339f5c02710a060d3a0be (patch) | |
| tree | 6af556d0d546f47fd7bd64db2daafb5b2b6e74ea /linux/drivers/media/video/v4l2-device.c | |
| parent | 0f2ea07a22d87dcff3529fd787f8b41ed665bb28 (diff) | |
| download | mediapointer-dvb-s2-48beb6bb3e66daddf4c339f5c02710a060d3a0be.tar.gz mediapointer-dvb-s2-48beb6bb3e66daddf4c339f5c02710a060d3a0be.tar.bz2 | |
v4l2-device: add v4l2_device_disconnect
From: Hans Verkuil <hverkuil@xs4all.nl>
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.
Priority: normal
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'linux/drivers/media/video/v4l2-device.c')
| -rw-r--r-- | linux/drivers/media/video/v4l2-device.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/linux/drivers/media/video/v4l2-device.c b/linux/drivers/media/video/v4l2-device.c index 35e42e947..2cb81c210 100644 --- a/linux/drivers/media/video/v4l2-device.c +++ b/linux/drivers/media/video/v4l2-device.c @@ -50,19 +50,26 @@ 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); |