Android之USB Camera摄像头节点后移

Android上usb camera在预览或者录像的时候，如果插拔摄像头会导致摄像头节点后移（/dev/video2->/dev/video3->/dev/video4->/dev/video5），可修改如下：

diff --git a/kernel/drivers/media/v4l2-core/v4l2-dev.c b/kernel/drivers/media/v4l2-core/v4l2-dev.c

index ed5040e..920646e 100644

--- a/kernel/drivers/media/v4l2-core/v4l2-dev.c

+++ b/kernel/drivers/media/v4l2-core/v4l2-dev.c

@@ -976,6 +976,7 @@ void video_unregister_device(struct video_device *vdev)

*/

clear_bit(V4L2_FL_REGISTERED, &vdev->flags);

mutex_unlock(&videodev_lock);

+ devnode_clear(vdev); //增加这行

device_unregister(&vdev->dev);

}

EXPORT_SYMBOL(video_unregister_device);