New STM32F2/F4 DMA2 errata

[Giovanni]

I have been following this for a while, finally we have an official answer and it is much less important than I initially thought, the whole discussion is here.

There is no impact on ChibiOS/RT unless you use one of: DCMI, CRYPT or HASH with DMA. In this case you must avoid concurrent use of any APB2 peripheral using DMA: SPI1, SDIO, ADC1, ADC2, ADC3, USART1, USART6. Peripherals can be still used concurrently without DMA, for example USART1 and USART6 can be used with the serial driver without problems.

STM32 F1 and L1 devices are not impacted.

Giovanni