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V4L/DVB (8852): v4l2: use register_chrdev_region instead of register_chrdev

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Replace the old register_chrdev with the more flexible register_chrdev_region.

Ensure that the release() is called when the very last chardev usage was
released, and not when the sysfs devices were removed. This should simplify
hotpluggable drivers considerably.

Tested-by: Mike Isely <[email protected]>
Tested-by: Laurent Pinchart <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>
Acked-by: David Ellingsworth <[email protected]>
Reviewed-by: Hans de Goede <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Hans Verkuil 2008-08-29 17:31:35 -03:00 • committed by Mauro Carvalho Chehab
commit 7f8ecfab7a
2 changed files with 66 additions and 68 deletions
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3
include/media/v4l2-dev.h
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@ -12,6 +12,7 @@
#include <linux/poll.h>
#include <linux/fs.h>
#include <linux/device.h>
#include <linux/cdev.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
@ -47,6 +48,8 @@ struct video_device
/* sysfs */
struct device dev; /* v4l device */
struct cdev cdev; /* character device */
void (*cdev_release)(struct kobject *kobj);
struct device *parent; /* device parent */
/* device info */