On Sat, 2019-01-05 at 09:01 +0100, Christoph Hellwig wrote:
> Just use a simple if/else chain to select the DMA mode.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
> ---
> drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 25 ++++++-------------------
> 1 file changed, 6 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> index c2060f6cc9e8..86387735a90b 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> @@ -566,34 +566,21 @@ static int vmw_dma_select_mode(struct
> vmw_private *dev_priv)
> [vmw_dma_map_populate] = "Keeping DMA mappings.",
> [vmw_dma_map_bind] = "Giving up DMA mappings early."};
>
> - if (intel_iommu_enabled) {
> + if (vmw_force_coherent)
> + dev_priv->map_mode = vmw_dma_alloc_coherent;
> + else if (intel_iommu_enabled)
> dev_priv->map_mode = vmw_dma_map_populate;
> - goto out_fixup;
> - }
> -
> - if (!(vmw_force_iommu || vmw_force_coherent)) {
> + else if (!vmw_force_iommu)
> dev_priv->map_mode = vmw_dma_phys;
> - DRM_INFO("DMA map mode: %s\n", names[dev_priv-
> >map_mode]);
> - return 0;
> - }
> -
> -#ifdef CONFIG_SWIOTLB
> - if (swiotlb_nr_tbl())
> + else if (IS_ENABLED(CONFIG_SWIOTLB) && swiotlb_nr_tbl())
> dev_priv->map_mode = vmw_dma_alloc_coherent;
> else
> -#endif
> dev_priv->map_mode = vmw_dma_map_populate;
>
> -out_fixup:
> - if (dev_priv->map_mode == vmw_dma_map_populate &&
> - vmw_restrict_iommu)
> + if (dev_priv->map_mode == vmw_dma_map_populate &&
> vmw_restrict_iommu)
> dev_priv->map_mode = vmw_dma_map_bind;
>
> - if (vmw_force_coherent)
> - dev_priv->map_mode = vmw_dma_alloc_coherent;
> -
> DRM_INFO("DMA map mode: %s\n", names[dev_priv->map_mode]);
> -
> return 0;
> }
>
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