V4L/DVB (8780): v4l: replace the last uses of video_exclusive_open/release

Handle the video_exclusive_open/release functionality inside the
driver.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 19 insertions, 2 deletions

diff --git a/drivers/media/video/bw-qcam.c b/drivers/media/video/bw-qcam.c
index 01f07707827f..e8e1bb122b59 100644
--- a/drivers/media/video/bw-qcam.c
+++ b/drivers/media/video/bw-qcam.c
@@ -894,10 +894,27 @@ 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;
+}
+
 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,