diff --git a/drivers/media/video/cx23885/cx23885-417.c b/drivers/media/video/cx23885/cx23885-417.c
index 7b0e8c0..93777d0 100644
--- a/drivers/media/video/cx23885/cx23885-417.c
+++ b/drivers/media/video/cx23885/cx23885-417.c
@@ -1583,6 +1583,7 @@
 
 	dprintk(2, "%s()\n", __func__);
 
+	lock_kernel();
 	list_for_each(list, &cx23885_devlist) {
 		h = list_entry(list, struct cx23885_dev, devlist);
 		if (h->v4l_device->minor == minor) {
@@ -1591,13 +1592,17 @@
 		}
 	}
 
-	if (dev == NULL)
+	if (dev == NULL) {
+		unlock_kernel();
 		return -ENODEV;
+	}
 
 	/* allocate + initialize per filehandle data */
 	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
-	if (NULL == fh)
+	if (NULL == fh) {
+		unlock_kernel();
 		return -ENOMEM;
+	}
 
 	file->private_data = fh;
 	fh->dev      = dev;
@@ -1608,6 +1613,7 @@
 			    V4L2_FIELD_INTERLACED,
 			    sizeof(struct cx23885_buffer),
 			    fh);
+	unlock_kernel();
 
 	return 0;
 }
diff --git a/drivers/media/video/cx23885/cx23885-video.c b/drivers/media/video/cx23885/cx23885-video.c
index 6047c78..d9bef1a 100644
--- a/drivers/media/video/cx23885/cx23885-video.c
+++ b/drivers/media/video/cx23885/cx23885-video.c
@@ -731,6 +731,7 @@
 	enum v4l2_buf_type type = 0;
 	int radio = 0;
 
+	lock_kernel();
 	list_for_each(list, &cx23885_devlist) {
 		h = list_entry(list, struct cx23885_dev, devlist);
 		if (h->video_dev->minor == minor) {
@@ -748,16 +749,20 @@
 			dev   = h;
 		}
 	}
-	if (NULL == dev)
+	if (NULL == dev) {
+		unlock_kernel();
 		return -ENODEV;
+	}
 
 	dprintk(1, "open minor=%d radio=%d type=%s\n",
 		minor, radio, v4l2_type_names[type]);
 
 	/* allocate + initialize per filehandle data */
 	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
-	if (NULL == fh)
+	if (NULL == fh) {
+		unlock_kernel();
 		return -ENOMEM;
+	}
 	file->private_data = fh;
 	fh->dev      = dev;
 	fh->radio    = radio;
@@ -775,6 +780,7 @@
 
 	dprintk(1, "post videobuf_queue_init()\n");
 
+	unlock_kernel();
 
 	return 0;
 }