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Date:   Tue, 24 Jul 2018 07:32:27 +0200
From:   Hauke Mehrtens <>
To:     Paul Burton <>
Subject: Re: [PATCH 1/4] MIPS: lantiq: Do not enable IRQs in dma open

On 07/24/2018 02:19 AM, Paul Burton wrote:
> Hi Hauke,
> On Sat, Jul 21, 2018 at 09:13:55PM +0200, Hauke Mehrtens wrote:
>> When a DMA channel is opened the IRQ should not get activated
>> automatically, this allows it to pull data out manually without the help
>> of interrupts. This is needed for a workaround in the vrx200 Ethernet
>> driver.
>> Signed-off-by: Hauke Mehrtens <>
>> ---
>>  arch/mips/lantiq/xway/dma.c        | 1 -
>>  drivers/net/ethernet/lantiq_etop.c | 1 +
>>  2 files changed, 1 insertion(+), 1 deletion(-)
> If you'd like this to go via the netdev tree to keep it with the rest of
> the series:
>     Acked-by: Paul Burton <>

Thanks, I also prefer that this goes through netdev.

> Though I'd be happier if we didn't have DMA code seemingly used only by
> an ethernet driver in arch/mips/ :)

There are also some out of tree driver that use this DMA code. This
should probably be converted to a DMA channel driver but that is not
very high on my todo list.


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