On 09/25/2017 09:55 AM, Joakim Tjernlund wrote: > We got some "broken" boards(mpx8321) where UART RX is held low(BREAK) > There we get a few: > serial8250: too much work for irq18 > and the board freezes. > > Looking inte to driver/CPU there is an errtum(A-004737) w.r.t BREAK handling > and I can see we are hitting the irq function fsl8250_handle_irq() added > in commit: 9deaa53ac7fa373623123aa4f18828dd62292b1a > "serial: add irq handler for Freescale 16550 errata." > For all I can tell this workaround is broken and I cannot figure out why. > Any pointers? >
Jocke, Did you mean MPC8321? I personally don't have experience debugging this erratum. Have you tried to contact the patch author Paul Gortmaker to see how he managed to get it work? York
