From: Ilias Apalodimas <ilias.apalodi...@linaro.org>
Date: Thu, 11 Oct 2018 15:28:26 +0300
> commit 63ae7949e94a ("net: socionext: Use descriptor info instead of MMIO
> reads on Rx")
> removed constant mmio reads from the driver and started using a descriptor
> field to check if packet should be processed.
> This lead the napi rx handler being constantly called while no packets
> needed processing and ksoftirq getting 100% cpu usage. Issue one mmio read
> to clear the irq correcty after processing packets
>
> Signed-off-by: Ilias Apalodimas <ilias.apalodi...@linaro.org>
> Reported-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
Applied.
