RT-Thread / RT-Thread/rt-thread
_serial_dma_tx中的dma发送去做dataqueue意义不大
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- Dominant language
- C
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Description
https://github.com/RT-Thread/rt-thread/blob/68da10625347cfe34fad8b73a78feffbe311d561/components/drivers/serial/dev_serial.c#L580
_serial_dma_tx中的dma发送如果不做同步发送，由于dataqueue没有拷贝数据副本，将可能出现内存非法访问
如果做了同步机制，由于tx_complete回调局限于device，只能做串行化发送，dataqueue失去了想要实现的异步效果
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First steps
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Research direction
Start in components/drivers/serial/dev_serial.c around _serial_dma_tx, then trace how dataqueue ownership interacts with the tx_complete callback. Determine how the current asynchronous path can access released data and how synchronization affects serialization. Done means resolving the invalid-memory-access risk without losing the intended asynchronous behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- embedded-iot, operating-systems
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100