linux-kernel - Re: [PATCH 7/9] spi: s3c64xx: Use dma_request

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Date:   Thu, 14 Nov 2019 11:12:30 +0200
From:   Andi Shyti <andi@...zian.org>
To:     Peter Ujfalusi <peter.ujfalusi@...com>
Cc:     Andi Shyti <andi@...zian.org>, linus.walleij@...aro.org,
        kgene@...nel.org, alexandre.belloni@...tlin.com,
        linux-arm-msm@...r.kernel.org, radu_nicolae.pirea@....ro,
        linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        krzk@...nel.org, bjorn.andersson@...aro.org, vkoul@...nel.org,
        agross@...nel.org, ldewangan@...dia.com, broonie@...nel.org,
        linux-tegra@...r.kernel.org, thierry.reding@...il.com,
        jonathanh@...dia.com, shawnguo@...nel.org, s.hauer@...gutronix.de,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 7/9] spi: s3c64xx: Use dma_request_chan() directly for
 channel request

Hi Peter,

> >>  	if (!is_polling(sdd)) {
> >>  		/* Acquire DMA channels */
> >> -		sdd->rx_dma.ch = dma_request_slave_channel_reason(&pdev->dev,
> >> -								  "rx");
> >> +		sdd->rx_dma.ch = dma_request_chan(&pdev->dev, "rx");
> > 
> > I have a little concern here. We have two funcions
> > 'dma_request_chan' and  'dma_request_channel' don't we end up
> > making some confusion here?
> > 
> > Wouldn't it make more sense renaming 'dma_request_chan' to
> > 'dma_request_slave_channel_reason'?
> 
> The dma_request_channel() should go away. It was the old API before we
> got the dma_slave_map for non DT (and non ACPI) platforms so we can get
> rid of the filter function exports from DMA drivers to clients all over
> the place.

Yes, I agree... thanks!

Acked-by: Andi Shyti <andi@...zian.org>

Thanks,
Andi