[PATCH 02/18] drm/etnaviv: only try to use the linear window on MMUv1

[Lucas Stach]

As the comment above the code states, the linear window is only
available on MMUv1. Don't try to use it on MMUv2.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 drivers/gpu/drm/etnaviv/etnaviv_mmu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c 
b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
index 29a723fabc17..e2013b5b3f6a 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -115,7 +115,8 @@ int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
        mutex_lock(&mmu->lock);

        /* v1 MMU can optimize single entry (contiguous) scatterlists */
-       if (sgt->nents == 1 && !(etnaviv_obj->flags & ETNA_BO_FORCE_MMU)) {
+       if (mmu->version == ETNAVIV_IOMMU_V1 &&
+           sgt->nents == 1 && !(etnaviv_obj->flags & ETNA_BO_FORCE_MMU)) {
                u32 iova;

                iova = sg_dma_address(sgt->sgl) - memory_base;
-- 
2.8.1