iommu: fix initialization without 'add_device' callback
IOMMU drivers can be initialized from of_iommu helpers. Such drivers don't
need to provide device_add callbacks to operate properly, so there is no
need to fail initialization if the callback is missing.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index ed8b048..02f798b 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -737,7 +737,7 @@
const struct iommu_ops *ops = cb->ops;
if (!ops->add_device)
- return -ENODEV;
+ return 0;
WARN_ON(dev->iommu_group);