[PATCH 2/5] spi: pl022: use generic DMA slave configuration if possible

Arnd Bergmann
2013-02-08T16:28:29Z

On Friday 08 February 2013 16:22:48 Russell King - ARM Linux wrote:
> If it's DMA _to_ a device, then we will only ever clean the lines prior to
> a transfer, never invalidate them. So that's not really a concern. (There
> better not be any dirty cache lines associated with the empty zero page
> either.)

Right, makes sense. I thought I had read about a CPU that
could not flush a cache line without also invalidating
it, but that must have been something other than ARM,
or maybe I'm misremembering it.

Arnd