On Thu, Apr 02, 2015 at 05:30:32PM +0200, Lucas Stach wrote:
> The intention clearly was to do the same thing for WC and UC buffers,
> not for cached ones.
Err, from one of my previous commits:
staging: etnaviv: fix DMA API usage
We test for write-combine and non-cacheable mappings before calling the
DMA API. This is werid, because non-cacheable mappings are DMA coherent
by definition, whereas cacheable mappings need cache maintanence
provided by the DMA API.
This seems to be a typo: ETNA_BO_CACHED should be used rather than
ETNA_BO_UNCACHED.
It's utterly senseless to use the DMA API on uncached mappings.
--
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according to speedtest.net.
