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As David Daney pointed in mlx4_core driver [1], mlx5_core is also misusing the DMA-API. This patch is removing the code that vmap() memory allocated by dma_alloc_coherent(). After this patch, users of this drivers might fail allocating resources on memory fragmeneted systems. This will be fixed later on. [1] - https://patchwork.ozlabs.org/patch/458531/ CC: David Daney <[email protected]> Signed-off-by: Amir Vadai <[email protected]> Signed-off-by: David S. Miller <[email protected]>