drm/arm/malidp: Stop using iommu_present()

iommu_get_domain_for_dev() is already perfectly happy to return NULL
if the given device has no IOMMU. Drop the unnecessary check.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5049994e6c2ba92c2f30d51850c8929136d0f8ca.1649167878.git.robin.murphy@arm.com

diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c
index 0562bda..81d9f50 100644 (file)
--- a/drivers/gpu/drm/arm/malidp_planes.c
+++ b/drivers/gpu/drm/arm/malidp_planes.c
@@ -310,17 +310,13 @@ static int malidp_se_check_scaling(struct malidp_plane *mp,
 
 static u32 malidp_get_pgsize_bitmap(struct malidp_plane *mp)
 {
-       u32 pgsize_bitmap = 0;
+       struct iommu_domain *mmu_dom;
 
-       if (iommu_present(&platform_bus_type)) {
-               struct iommu_domain *mmu_dom =
-                       iommu_get_domain_for_dev(mp->base.dev->dev);
+       mmu_dom = iommu_get_domain_for_dev(mp->base.dev->dev);
+       if (mmu_dom)
+               return mmu_dom->pgsize_bitmap;
 
-               if (mmu_dom)
-                       pgsize_bitmap = mmu_dom->pgsize_bitmap;
-       }
-
-       return pgsize_bitmap;
+       return 0;
 }
 
 /*