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SubjectRe: serial8250: bogus low_latency destabilizes kernel, need sanity check
> Maybe we should unset the low_latency flag as soon as DMA fails?  There
> are two flags, one is state->uart_port->flags and the other is
> port->low_latency. I guess we need to unset both.

Well low latency and DMA are pretty much exclusive in the real world so
probably DMA ports shouldn't allow low_latency to be set at all in DMA
mode.

Alan


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