Re: [PATCH v3] tty: serial: qcom_geni_serial: Fix softlock

[Stephen Boyd]

Quoting Ryan Case (2018-11-29 18:18:40)
> Transfers were being divided into device FIFO sized (64 byte max)
> operations which would poll for completion within a spin_lock_irqsave /
> spin_unlock_irqrestore block. This both made things slow by waiting for
> the FIFO to completely drain before adding further data and would also
> result in softlocks on large transmissions.
> 
> This patch allows larger transfers with continuous FIFO additions as
> space becomes available and removes polling from the interrupt handler.
> 
> Signed-off-by: Ryan Case <ryandcase@xxxxxxxxxxxx>
> ---

Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>