高通Camera驱动（8）-- error等异常事件

前文回顾

 上一篇文章，简单讲述close的过程

一 、异常流程

    1.1 原文解析

 * 13. In case of an error or other asynchronous event, the HAL must call
 *    camera3_callback_ops_t->notify() with the appropriate error/event
 *    message. After returning from a fatal device-wide error notification, the
 *    HAL should act as if close() had been called on it. However, the HAL must
 *    either cancel or complete all outstanding captures before calling
 *    notify(), so that once notify() is called with a fatal error, the
 *    framework will not receive further callbacks from the device. Methods
 *    besides close() should return -ENODEV or NULL after the notify() method
 *    returns from a fatal error message.

13、出现错误&异常：（1）如果发生错误或其他异步事件，则HAL必须调用结构体3.3camera3_callback_ops_t-> notify()具有相应的错误/事件()之外的方法应返回-ENODEV或NULL。
 

    1.2 官网文档

         暂无

    1.3 代码分析

//TODO，喝口水，远眺下，继续撸代码