Messages in this thread | | | Date | Thu, 26 Jul 2018 11:11:55 +0200 | From | Christoph Hellwig <> | Subject | Re: [PATCH] ARC: fix broken noncoherent cache ops |
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On Tue, Jul 24, 2018 at 05:13:02PM +0300, Eugeniy Paltsev wrote: > All DMA devices on ARC haven't worked with SW cache control > since commit a8eb92d02dd7 ("arc: fix arc_dma_{map,unmap}_page") > This happens because we don't check direction argument at all in > new implementation. Fix that. > > Fixies: commit a8eb92d02dd7 ("arc: fix arc_dma_{map,unmap}_page") > Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Looks sensible. Might be worth explaining that ARC can speculate into the areas under DMA, which is why this is required.
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