Re: [PATCH] spi: omap2-mcspi: In case of dma errors fall back topio

From: Tony Lindgren
Date: Tue Aug 07 2012 - 08:02:25 EST


* Shubhrajyoti <shubhrajyoti@xxxxxx> [120807 04:21]:
> On Tuesday 07 August 2012 01:17 PM, Tony Lindgren wrote:
> >> };
> > Don't you need to check separately for rx and tx dma? There's a slight
> > chance that you get a channel for one but not for the other..
> In that case I treat it as non usable and fall back to pio.

OK that should work too.

> Are you suggesting that let one channel be dma and only the failed one pio?

I guess both are doable. For reduced CPU load using DMA where possible
of course is the best way to go.

Tony
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