Return fail if given master device passed to add_device/remove_device callbacks doesn't has associated any sysmmu controller.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- drivers/iommu/exynos-iommu.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 0e7250fda087..a5f0c99602c2 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1081,6 +1081,9 @@ static int exynos_iommu_add_device(struct device *dev) struct iommu_group *group; int ret;
+ if (!has_sysmmu(dev)) + return -ENODEV; + group = iommu_group_get(dev);
if (!group) { @@ -1099,6 +1102,9 @@ static int exynos_iommu_add_device(struct device *dev)
static void exynos_iommu_remove_device(struct device *dev) { + if (!has_sysmmu(dev)) + return; + iommu_group_remove_device(dev); }