(I go no replies last week, so I'll try again, with less explanation...) If I master a DMA from a PCI device into a main memory buffer allocated with dma_alloc_noncoherent(), I need to synchronise the destination buffer using dma_sync_single_range_for_xxx() before and after the DMA.
But if the buffer is a very large chunk of memory (reserved at boot time) which has been ioremap()-ed into the virtual address space, do I need to still synchronise that memory? Thanks, -- Phil
