qcacmn: Remove improper kernel API for coherent memory
Memory allocated by dma_alloc_coherent() doesn't need cache sync, which
is only needed for stream dma mapping, eg, mapping passed-in memory
using dma_map_single().
More seriously, when SMMU enabled, physical memory returned by
dma_alloc_coherent() is no longer continuous. If pass this memory to
dma_sync_single_for_device(), a do_bad_area exception will hang system,
noting that dma_sync_single_for_device() only handles single contiguous
memory. Refer to Documentation/DMA-API.txt for more info.
Change-Id: Ia0b5bdcc2cb9335aa2e309efccd91e57e844c7cc
CRs-Fixed: 2381886
1 file changed