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1b1d371038
The iommu_dma_map_sg() function ensures iova allocation doesn't cross dma segment boundary. It does so by padding some sg elements. This can cause overflow, ending up with sg->length being set to 0. Avoid this by halving the maximum segment size (rounded down to PAGE_SIZE). Specify maximum segment size for sg elements by using sg_alloc_table_from_pages_segment() to allocate sg_table. v2: Use correct max segment size in dma_set_max_seg_size() call Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com> Reviewed-by: Bruce Chang <yu.bruce.chang@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>