Messages in this thread | | | Date | Wed, 1 Feb 2012 18:22:01 +0000 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH v2] dmaengine: care sd_dma_address/len in dmaengine_prep_slave_single() |
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On Mon, Jan 30, 2012 at 05:13:30PM -0800, Kuninori Morimoto wrote: > + sg_init_table(&sg, 1); > + sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf)), > + len, offset_in_page(buf));
There's not much point setting this - the page/virtual address should not be used by DMA engines as that may not reflect what's being requested (especially if there's an IOMMU in the way.)
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