iommu/exynos: Use generic group callback

Since iommu_group_get_for_dev() already tries iommu_group_get() and will
not call ops->device_group if the group is already non-NULL, the check
in get_device_iommu_group() is always redundant and it reduces to a
duplicate of the generic version; let's just use that one instead.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 2138102..210715f 100644 (file)
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -1238,17 +1238,6 @@ static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *iommu_domain,
        return phys;
 }
 
-static struct iommu_group *get_device_iommu_group(struct device *dev)
-{
-       struct iommu_group *group;
-
-       group = iommu_group_get(dev);
-       if (!group)
-               group = iommu_group_alloc();
-
-       return group;
-}
-
 static int exynos_iommu_add_device(struct device *dev)
 {
        struct exynos_iommu_owner *owner = dev->archdata.iommu;
@@ -1344,7 +1333,7 @@ static const struct iommu_ops exynos_iommu_ops = {
        .unmap = exynos_iommu_unmap,
        .map_sg = default_iommu_map_sg,
        .iova_to_phys = exynos_iommu_iova_to_phys,
-       .device_group = get_device_iommu_group,
+       .device_group = generic_device_group,
        .add_device = exynos_iommu_add_device,
        .remove_device = exynos_iommu_remove_device,
        .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,