Hi Gavin, On Fri, Jun 23, 2017 at 6:26 AM, Schenk, Gavin <G.Schenk@xxxxxxxxxxxx> wrote: > Uwe Kleine-König had the idea to disable DMA on the i.MX6dl based platform via dts and this is our current workaround. Please test Ian's patch: http://marc.info/?l=linux-serial&m=150005865213531&w=2 It should fix this DMA problem with RS485.