V4L/DVB (8732): zr364xx: handle video exclusive open internaly

Count the users and do not use video_exclusive_open() anymore.

Signed-off-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 14 insertions, 10 deletions

diff --git a/drivers/media/video/zr364xx.c b/drivers/media/video/zr364xx.c
index 9d5d5985a7ea..93991cb9ca71 100644
--- a/drivers/media/video/zr364xx.c
+++ b/drivers/media/video/zr364xx.c
@@ -116,6 +116,7 @@ struct zr364xx_camera {
         int height;
         int method;
         struct mutex lock;
+        int users;
 };
 
 
@@ -643,11 +644,10 @@ static int zr364xx_open(struct inode *inode, struct file *file)
 
         mutex_lock(&cam->lock);
 
-        cam->skip = 2;
-
-        err = video_exclusive_open(inode, file);
-        if (err < 0)
+        if (cam->users) {
+                err = -EBUSY;
                 goto out;
+        }
 
         if (!cam->framebuf) {
                 cam->framebuf = vmalloc_32(MAX_FRAME_SIZE * FRAMES);
@@ -669,6 +669,8 @@ static int zr364xx_open(struct inode *inode, struct file *file)
                 }
         }
 
+        cam->skip = 2;
+        cam->users++;
         file->private_data = vdev;
 
         /* Added some delay here, since opening/closing the camera quickly,
@@ -700,6 +702,10 @@ static int zr364xx_release(struct inode *inode, struct file *file)
         udev = cam->udev;
 
         mutex_lock(&cam->lock);
+
+        cam->users--;
+        file->private_data = NULL;
+
         for (i = 0; i < 2; i++) {
                 err =
                     send_control_msg(udev, 1, init[cam->method][i].value,
@@ -707,21 +713,19 @@ static int zr364xx_release(struct inode *inode, struct file *file)
                                      init[cam->method][i].size);
                 if (err < 0) {
                         info("error during release sequence");
-                        mutex_unlock(&cam->lock);
-                        return err;
+                        goto out;
                 }
         }
 
-        file->private_data = NULL;
-        video_exclusive_release(inode, file);
-
         /* Added some delay here, since opening/closing the camera quickly,
          * like Ekiga does during its startup, can crash the webcam
          */
         mdelay(100);
+        err = 0;
 
+out:
         mutex_unlock(&cam->lock);
-        return 0;
+        return err;
 }