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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2008-08-23 10:31:47 +0200 |
|---|---|---|
| committer | Hans Verkuil <hverkuil@xs4all.nl> | 2008-08-23 10:31:47 +0200 |
| commit | ebc50a51f87d69d522b94d64ec8d7da4df5bbb93 (patch) | |
| tree | da962ff624057233e60d7c090a7b18cb8aa9461d /linux/drivers/media/video/c-qcam.c | |
| parent | b5f5df65c8c54f89b3064a41b369a44f1883af0e (diff) | |
| download | mediapointer-dvb-s2-ebc50a51f87d69d522b94d64ec8d7da4df5bbb93.tar.gz mediapointer-dvb-s2-ebc50a51f87d69d522b94d64ec8d7da4df5bbb93.tar.bz2 | |
v4l: replace the last uses of video_exclusive_open/release
From: Hans Verkuil <hverkuil@xs4all.nl>
Handle the video_exclusive_open/release functionality inside the
driver.
Priority: normal
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Diffstat (limited to 'linux/drivers/media/video/c-qcam.c')
| -rw-r--r-- | linux/drivers/media/video/c-qcam.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/linux/drivers/media/video/c-qcam.c b/linux/drivers/media/video/c-qcam.c index cfb269a0c..9d1587007 100644 --- a/linux/drivers/media/video/c-qcam.c +++ b/linux/drivers/media/video/c-qcam.c @@ -52,6 +52,7 @@ struct qcam_device { int contrast, brightness, whitebal; int top, left; unsigned int bidirectional; + unsigned long in_use; struct mutex lock; }; @@ -688,11 +689,28 @@ static ssize_t qcam_read(struct file *file, char __user *buf, return len; } +static int qcam_exclusive_open(struct inode *inode, struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct qcam_device *qcam = (struct qcam_device *)dev; + + return test_and_set_bit(0, &qcam->in_use) ? -EBUSY : 0; +} + +static int qcam_exclusive_release(struct inode *inode, struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct qcam_device *qcam = (struct qcam_device *)dev; + + clear_bit(0, &qcam->in_use); + return 0; +} + /* video device template */ static const struct file_operations qcam_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = qcam_exclusive_open, + .release = qcam_exclusive_release, .ioctl = qcam_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, |