1 files changed, 30 insertions, 1 deletions

diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c
index 94aa485ade52..0d06e7cbd5b3 100644
--- a/drivers/media/video/v4l2-device.c
+++ b/drivers/media/video/v4l2-device.c
@@ -49,6 +49,22 @@ int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev)
 }
 EXPORT_SYMBOL_GPL(v4l2_device_register);
 
+int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename,
+                                                atomic_t *instance)
+{
+        int num = atomic_inc_return(instance) - 1;
+        int len = strlen(basename);
+
+        if (basename[len - 1] >= '0' && basename[len - 1] <= '9')
+                snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
+                                "%s-%d", basename, num);
+        else
+                snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
+                                "%s%d", basename, num);
+        return num;
+}
+EXPORT_SYMBOL_GPL(v4l2_device_set_name);
+
 void v4l2_device_disconnect(struct v4l2_device *v4l2_dev)
 {
         if (v4l2_dev->dev) {
@@ -67,8 +83,21 @@ void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
         v4l2_device_disconnect(v4l2_dev);
 
         /* Unregister subdevs */
-        list_for_each_entry_safe(sd, next, &v4l2_dev->subdevs, list)
+        list_for_each_entry_safe(sd, next, &v4l2_dev->subdevs, list) {
                 v4l2_device_unregister_subdev(sd);
+#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
+                if (sd->flags & V4L2_SUBDEV_FL_IS_I2C) {
+                        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+                        /* We need to unregister the i2c client explicitly.
+                           We cannot rely on i2c_del_adapter to always
+                           unregister clients for us, since if the i2c bus
+                           is a platform bus, then it is never deleted. */
+                        if (client)
+                                i2c_unregister_device(client);
+                }
+#endif
+        }
 }
 EXPORT_SYMBOL_GPL(v4l2_device_unregister);