rt-thread.git/components/drivers/usb/usbdevice, branch v5.1.xUnnamed repository; edit this file 'description' to name the repository.http://cgit.235523.xyz/rt-thread.git/atom/components/drivers/usb/usbdevice?h=v5.1.x2024-03-19T12:13:00Z[fix] NXP bsp for RT-Thread 5.1.0 fixed up.2024-03-19T12:13:00ZStackYuanyuanjyjyj@outlook.com2024-03-19T10:41:56Zurn:sha1:a582c0cc3133e6f317d93f921c7178ccf5ea3e95fix(serial_v2): tx_fifo->rb.buffer_ptr not init when RT_DEVICE_FLAG_DMA_TX and RT_SERIAL_TX_BLOCKING2024-02-21T05:29:53ZLaterComer12015333+Later-Comer@users.noreply.github.com2024-02-21T05:29:53Zurn:sha1:82bb104f650011684515508b846a7a7f9c7b229d
为什么提交这份PR (why to submit this PR)
serial_v2驱动框架，rt_serial_tx_enable()函数，在 DMA阻塞发送(RT_DEVICE_FLAG_DMA_TX and RT_SERIAL_TX_BLOCKING) 的时候，使用rt_malloc分配了tx_fifo内存，但是并未对tx_fifo->rb.buffer_ptr指针进行初始化（rt_malloc不会自动初始化内存），因此可能导致buffer_ptr是一个随机指针。但是rt_serail_write()函数需要根据tx_fifo->rb.buffer_ptr是否为RT_NULL来判断是调用_serial_fifo_tx_blocking_nbuf()还是_serial_fifo_tx_blocking_buf()。
由于tx_fifo->rb.buffer_ptr可能是一个随机值（不一定为RT_NULL=0），导致RT_DEVICE_FLAG_DMA_TX and RT_SERIAL_TX_BLOCKING模式下调用了_serial_fifo_tx_blocking_buf()，但是rb没有真正开辟内存空间，导致内存异常
你的解决方案是什么 (what is your solution)
rt_serial_tx_enable()，在DMA阻塞发送分支下，对tx_fifo->rb.buffer_ptr进行初始化，赋值为RT_NULL。[kernel][dm]适配新的设备驱动模型 (#8075)2023-10-18T12:50:30Zzms12345685141075+zmshahaha@users.noreply.github.com2023-10-18T12:50:30Zurn:sha1:d01dd05a0cd2107d85e26a445a43957880fd1978[include][dbg]update: no longer use RT_DEBUG_LOG in rtdebug.h (#7750)2023-06-29T15:24:25ZShicheng Chu1468559561@qq.com2023-06-29T15:24:25Zurn:sha1:e2c031643c8dec7c9ea1581216e19bf19c8f73f0[Kernel] message 可以返回消息的实际大小 (#7709)2023-06-21T10:22:42Zzhkagzhkag@foxmail.com2023-06-21T10:22:42Zurn:sha1:33f550cb65c950068ff04c331daeeda3547d2e50[components][rndis.c] add safety checking after allocating memory2023-05-12T05:37:42Zhust202013232u202013232@hust.edu.cn2023-05-12T05:37:42Zurn:sha1:9dd0d4125190907332c0510a1449c3cfdb0104bf[components][rndis.c] add a checkout procedure after malloc to make sure allocating successfully (#7460)2023-05-09T02:02:11ZkkangdomU202012151@hust.edu.cn2023-05-09T02:02:11Zurn:sha1:3cf07f1a62088245f15ee41b2e0a1df3711c1507[winusb.c] add checking after allocating memory for variable winusb_device to make sure allocae is successful2023-04-28T13:59:42Zourea1429131341319+ourea1429@users.noreply.github.com2023-04-28T13:59:42Zurn:sha1:085ded8eef541ee8b347468c42c359d580fcd127[HUST CSE] Fix many abnormal symbols in annotations and format code2023-04-18T02:26:23Z7YZ782019212+7YZ7@users.noreply.github.com2023-04-18T02:26:23Zurn:sha1:501b22aabede2d4e179bfc47f3b75522e5933da4[errno code][-RT_ERROR] fix that use RT_ERROR without -2023-03-20T04:06:16ZMeco Man920369182@qq.com2023-03-17T04:12:16Zurn:sha1:0f461e870c481a24ce2690cca1949706bb80f9e7