mirror of
https://github.com/torvalds/linux.git
synced 2024-12-04 18:13:04 +00:00
bcb63314e2
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.
The patch has been created with the following command without manual edits:
git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
/*
|
|
* v4l2-fh.c
|
|
*
|
|
* V4L2 file handles.
|
|
*
|
|
* Copyright (C) 2009--2010 Nokia Corporation.
|
|
*
|
|
* Contact: Sakari Ailus <sakari.ailus@iki.fi>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/export.h>
|
|
#include <media/v4l2-dev.h>
|
|
#include <media/v4l2-fh.h>
|
|
#include <media/v4l2-event.h>
|
|
#include <media/v4l2-ioctl.h>
|
|
#include <media/v4l2-mc.h>
|
|
|
|
void v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)
|
|
{
|
|
fh->vdev = vdev;
|
|
/* Inherit from video_device. May be overridden by the driver. */
|
|
fh->ctrl_handler = vdev->ctrl_handler;
|
|
INIT_LIST_HEAD(&fh->list);
|
|
set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags);
|
|
/*
|
|
* determine_valid_ioctls() does not know if struct v4l2_fh
|
|
* is used by this driver, but here we do. So enable the
|
|
* prio ioctls here.
|
|
*/
|
|
set_bit(_IOC_NR(VIDIOC_G_PRIORITY), vdev->valid_ioctls);
|
|
set_bit(_IOC_NR(VIDIOC_S_PRIORITY), vdev->valid_ioctls);
|
|
fh->prio = V4L2_PRIORITY_UNSET;
|
|
init_waitqueue_head(&fh->wait);
|
|
INIT_LIST_HEAD(&fh->available);
|
|
INIT_LIST_HEAD(&fh->subscribed);
|
|
fh->sequence = -1;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fh_init);
|
|
|
|
void v4l2_fh_add(struct v4l2_fh *fh)
|
|
{
|
|
unsigned long flags;
|
|
|
|
v4l2_prio_open(fh->vdev->prio, &fh->prio);
|
|
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
|
|
list_add(&fh->list, &fh->vdev->fh_list);
|
|
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fh_add);
|
|
|
|
int v4l2_fh_open(struct file *filp)
|
|
{
|
|
struct video_device *vdev = video_devdata(filp);
|
|
struct v4l2_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL);
|
|
|
|
filp->private_data = fh;
|
|
if (fh == NULL)
|
|
return -ENOMEM;
|
|
v4l2_fh_init(fh, vdev);
|
|
v4l2_fh_add(fh);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fh_open);
|
|
|
|
void v4l2_fh_del(struct v4l2_fh *fh)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
|
|
list_del_init(&fh->list);
|
|
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
|
|
v4l2_prio_close(fh->vdev->prio, fh->prio);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fh_del);
|
|
|
|
void v4l2_fh_exit(struct v4l2_fh *fh)
|
|
{
|
|
if (fh->vdev == NULL)
|
|
return;
|
|
v4l_disable_media_source(fh->vdev);
|
|
v4l2_event_unsubscribe_all(fh);
|
|
fh->vdev = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fh_exit);
|
|
|
|
int v4l2_fh_release(struct file *filp)
|
|
{
|
|
struct v4l2_fh *fh = filp->private_data;
|
|
|
|
if (fh) {
|
|
v4l2_fh_del(fh);
|
|
v4l2_fh_exit(fh);
|
|
kfree(fh);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fh_release);
|
|
|
|
int v4l2_fh_is_singular(struct v4l2_fh *fh)
|
|
{
|
|
unsigned long flags;
|
|
int is_singular;
|
|
|
|
if (fh == NULL || fh->vdev == NULL)
|
|
return 0;
|
|
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
|
|
is_singular = list_is_singular(&fh->list);
|
|
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
|
|
return is_singular;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_fh_is_singular);
|