V4L/DVB (4413): Konicawc - handle errors from input_register_device()

Compile-tested only (no hardware)

Signed-off-by: Dmitry Torokhov <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/video/usbvideo/konicawc.c

···
 static void konicawc_register_input(struct konicawc *cam, struct usb_device *dev)
 {
 	struct input_dev *input_dev;
+	int error;
 
 	usb_make_path(dev, cam->input_physname, sizeof(cam->input_physname));
 	strncat(cam->input_physname, "/input0", sizeof(cam->input_physname));
···
 
 	input_dev->private = cam;
 
-	input_register_device(cam->input);
+	error = input_register_device(cam->input);
+	if (error) {
+		warn("Failed to register camera's input device, err: %d\n",
+		     error);
+		input_free_device(cam->input);
+		cam->input = NULL;
+	}
 }
 
 static void konicawc_unregister_input(struct konicawc *cam)