V4L/DVB (11392): patch: s2255drv driver removal problem fixed

This patch fixes kfree problem on driver removal, fixes streamoff problem
and removes unnecessary videobuf_waiton from free_buffer function.
Signed-off-by: Dean Anderson <dean@sensoray.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/s2255drv.c

@@ -722,7 +722,6 @@ static void free_buffer(struct videobuf_queue *vq, struct s2255_buffer *buf)
 {
 	dprintk(4, "%s\n", __func__);
 
-	videobuf_waiton(&buf->vb, 0, 0);
 	videobuf_vmalloc_free(&buf->vb);
 	buf->vb.state = VIDEOBUF_NEEDS_INIT;
 }
@@ -1324,7 +1323,6 @@ static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 
 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 {
-	int res;
 	struct s2255_fh *fh = priv;
 	struct s2255_dev *dev = fh->dev;
 
@@ -1338,9 +1336,7 @@ static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 		return -EINVAL;
 	}
 	s2255_stop_acquire(dev, fh->channel);
-	res = videobuf_streamoff(&fh->vb_vidq);
-	if (res < 0)
-		return res;
+	videobuf_streamoff(&fh->vb_vidq);
 	res_free(dev, fh);
 	return 0;
 }
@@ -1707,13 +1703,13 @@ static void s2255_destroy(struct kref *kref)
 	kfree(dev->fw_data);
 	usb_put_dev(dev->udev);
 	dprintk(1, "%s", __func__);
-	kfree(dev);
 
 	while (!list_empty(&s2255_devlist)) {
 		list = s2255_devlist.next;
 		list_del(list);
 	}
 	mutex_unlock(&dev->open_lock);
+	kfree(dev);
 }
 
 static int s2255_close(struct file *file)