1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/media/video/usbvision/usbvision-i2c.c b/drivers/media/video/usbvision/usbvision-i2c.c
index 42ba28785750..e3bbae26e3ce 100644
--- a/drivers/media/video/usbvision/usbvision-i2c.c
+++ b/drivers/media/video/usbvision/usbvision-i2c.c
@@ -211,6 +211,9 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
                 0x42 >> 1, 0x40 >> 1,   /* SAA7114, SAA7115 and SAA7118 */
                 I2C_CLIENT_END };
 
+        if (usbvision->registered_i2c)
+                return 0;
+
         memcpy(&usbvision->i2c_adap, &i2c_adap_template,
                sizeof(struct i2c_adapter));
 
@@ -248,7 +251,7 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
                    hit-and-miss. */
                 mdelay(10);
                 v4l2_i2c_new_subdev(&usbvision->v4l2_dev,
-                                &usbvision->i2c_adap, "saa7115",
+                                &usbvision->i2c_adap, NULL,
                                 "saa7115_auto", 0, saa711x_addrs);
                 break;
         }
@@ -258,16 +261,18 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
                 struct tuner_setup tun_setup;
 
                 sd = v4l2_i2c_new_subdev(&usbvision->v4l2_dev,
-                                &usbvision->i2c_adap, "tuner",
+                                &usbvision->i2c_adap, NULL,
                                 "tuner", 0, v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
                 /* depending on whether we found a demod or not, select
                    the tuner type. */
                 type = sd ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
 
                 sd = v4l2_i2c_new_subdev(&usbvision->v4l2_dev,
-                                &usbvision->i2c_adap, "tuner",
+                                &usbvision->i2c_adap, NULL,
                                 "tuner", 0, v4l2_i2c_tuner_addrs(type));
 
+                if (sd == NULL)
+                        return -ENODEV;
                 if (usbvision->tuner_type != -1) {
                         tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
                         tun_setup.type = usbvision->tuner_type;
@@ -275,14 +280,18 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
                         call_all(usbvision, tuner, s_type_addr, &tun_setup);
                 }
         }
+        usbvision->registered_i2c = 1;
 
         return 0;
 }
 
 int usbvision_i2c_unregister(struct usb_usbvision *usbvision)
 {
+        if (!usbvision->registered_i2c)
+                return 0;
 
         i2c_del_adapter(&(usbvision->i2c_adap));
+        usbvision->registered_i2c = 0;
 
         PDEBUG(DBG_I2C,"i2c bus for %s unregistered", usbvision->i2c_adap.name);