This patch fixes support for runtime power management for SYSMMU controllers, so they are enabled when master device is attached.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- drivers/iommu/exynos-iommu.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index c6cca44d7858..f8609f40ae59 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -695,6 +695,7 @@ static int exynos_iommu_attach_device(struct iommu_domain *domain, return -ENODEV;
list_for_each_entry(data, &owner->clients, owner_node) { + pm_runtime_get_sync(data->sysmmu); ret = __sysmmu_enable(data, pagetable, domain); if (ret >= 0) { data->master = dev; @@ -736,6 +737,7 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain, data->master = NULL; list_del_init(&data->domain_node); } + pm_runtime_put(data->sysmmu); found = true; } }