USB hangs if receiving UART stream over 10kB/s
MrJake222 opened this issue · 2 comments
MrJake222 commented
I don't know the details yet, but it spams error -71 in dmesg. Will investigate with picoprobe later.
MrJake222 commented
The bug is related to UART incoming characters interrupts flushing the input while the mutex is locked by some other function (particularly by another flush).
Stacktrace screenshot from when the adapter becomes unresponsive:
josuah commented
Thank you for tracing this down! Indeed, since the OSAL calls a mutex through the RP2040, this cannot be used in IRQ.
I will discuss on the draft pull request.