Messages in this thread | | | Date | Wed, 30 Oct 2019 23:38:18 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH 1/4] net: sgi: ioc3-eth: don't abuse dma_direct_* calls |
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On Wed, Oct 30, 2019 at 11:05:49PM +0100, Thomas Bogendoerfer wrote: > On Wed, 30 Oct 2019 14:12:30 -0700 > Christoph Hellwig <hch@lst.de> wrote: > > > dma_direct_ is a low-level API that must never be used by drivers > > directly. Switch to use the proper DMA API instead. > > is the 4kb/16kb alignment still guaranteed ? If not how is the way > to get such an alignment ?
The DMA API gives you page aligned memory. dma_direct doesn't give you any gurantees as it is an internal API explicitly documented as not for driver usage that can change at any time.
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