On Tue, May 31, 2016 at 12:44:54PM +0200, Michal Suchanek wrote: > On 30 May 2016 at 17:50, Mark Brown <broonie@xxxxxxxxxx> wrote: > > On Mon, May 30, 2016 at 05:28:10PM +0200, Michal Suchanek wrote: > >> It's what the driver did to start with and it was requested to fall > >> back to non-DMA in the case DMA is not available. > > Why? I really can't see any sensible use case for this that doesn't > > have a better solution available. > Of course, the solution is to compile in the DMA driver. > It's been argued that some drivers which use only short transfers will > just work. With nothing else in the system that needs DMA? It's making the performance of the system less reliable for the benefit of a very narrow use case.
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