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Store dma_dir in struct vb2_queue and reuse it, instead of recalculating it each time. Signed-off-by: Pawel Osciak <posciak@chromium.org> BUG=chrome-os-partner:45346 TEST=video playback Reviewed-on: https://chromium-review.googlesource.com/300725 Commit-Ready: Pawel Osciak <posciak@chromium.org> Tested-by: Pawel Osciak <posciak@chromium.org> Reviewed-by: Tomasz Figa <tfiga@chromium.org> Reviewed-by: Owen Lin <owenlin@chromium.org> Conflicts: drivers/media/v4l2-core/videobuf2-core.c Change-Id: Ia5405cd758ffef0b0319d184a2f32699ebc805ea Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com> Signed-off-by: Yakir Yang <ykk@rock-chips.com>