Messages in this thread | | | Date | Mon, 11 Sep 2017 00:39:06 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH 2/2] scsi: Align queue to ARCH_DMA_MINALIGN in non-coherent DMA mode |
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> + if (plat_device_is_coherent(dev))
We can't just call platform device code. We'll need a proper DMA API call for this.
> + blk_queue_dma_alignment(q, 0x04 - 1); > + else > + blk_queue_dma_alignment(q, dma_get_cache_alignment() - 1);
Which we already have with dma_get_cache_alignment, except that it doesn't take a struct device pointer and doesn't call into dma_map ops. So please add a struct device argument to dma_get_cache_alignment, and let it call into dma_map_ops where needed.
With that you can replace the above with:
blk_queue_dma_alignment(q, max(0x04U, dma_get_cache_alignment(dev)) - 1);
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