On Thu, Apr 04, 2024 at 09:54:15AM +0300, Tony Lindgren wrote: > * Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> [240403 14:00]: > > Probably we need to check if the port is still open... > > > > P.S. AFAIU the state / xmit is invalid pointer or so. > > > > Culprit line: serial_out(up, UART_TX, xmit->buf[xmit->tail]); xmit.buf seems to be NULL, that's why this fails. > Maybe we can set UPF_DEAD a bit earlier as below? Lemme perform some tests later today. -- With Best Regards, Andy Shevchenko