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-rw-r--r--include/media/v4l2-device.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h
index 3d8e96f6ceb3..0dd3e8e8653e 100644
--- a/include/media/v4l2-device.h
+++ b/include/media/v4l2-device.h
@@ -53,7 +53,11 @@ struct v4l2_device {
dev may be NULL in rare cases (ISA devices). In that case you
must fill in the v4l2_dev->name field before calling this function. */
int __must_check v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev);
-/* Set v4l2_dev->dev->driver_data to NULL and unregister all sub-devices */
+/* Set v4l2_dev->dev to NULL. Call when the USB parent disconnects.
+ Since the parent disappears this ensures that v4l2_dev doesn't have an
+ invalid parent pointer. */
+void v4l2_device_disconnect(struct v4l2_device *v4l2_dev);
+/* Unregister all sub-devices and any other resources related to v4l2_dev. */
void v4l2_device_unregister(struct v4l2_device *v4l2_dev);
/* Register a subdev with a v4l2 device. While registered the subdev module