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path: root/drivers/iommu/exynos-iommu.c
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Diffstat (limited to 'drivers/iommu/exynos-iommu.c')
-rw-r--r--drivers/iommu/exynos-iommu.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 45a7c6bab9b3..52ded8461a74 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -638,10 +638,12 @@ static int exynos_sysmmu_suspend(struct device *dev)
struct sysmmu_drvdata *data = dev_get_drvdata(dev);
struct device *master = data->master;
- dev_dbg(dev, "suspend\n");
if (master) {
- __sysmmu_disable(data);
pm_runtime_put(dev);
+ if (data->domain) {
+ dev_dbg(data->sysmmu, "saving state\n");
+ __sysmmu_disable(data);
+ }
}
return 0;
}
@@ -651,10 +653,12 @@ static int exynos_sysmmu_resume(struct device *dev)
struct sysmmu_drvdata *data = dev_get_drvdata(dev);
struct device *master = data->master;
- dev_dbg(dev, "resume\n");
if (master) {
pm_runtime_get_sync(dev);
- __sysmmu_enable(data);
+ if (data->domain) {
+ dev_dbg(data->sysmmu, "restoring state\n");
+ __sysmmu_enable(data);
+ }
}
return 0;
}
@@ -768,7 +772,6 @@ static void exynos_iommu_domain_free(struct iommu_domain *iommu_domain)
__sysmmu_disable(data);
data->pgtable = 0;
data->domain = NULL;
- data->master = NULL;
list_del_init(&data->domain_node);
}
@@ -810,7 +813,6 @@ static void exynos_iommu_detach_device(struct iommu_domain *iommu_domain,
spin_lock_irqsave(&domain->lock, flags);
list_for_each_entry_safe(data, next, &domain->clients, domain_node) {
__sysmmu_disable(data);
- data->master = NULL;
data->pgtable = 0;
data->domain = NULL;
list_del_init(&data->domain_node);
@@ -844,7 +846,6 @@ static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain,
data->domain = domain;
pm_runtime_get_sync(data->sysmmu);
__sysmmu_enable(data);
- data->master = dev;
spin_lock_irqsave(&domain->lock, flags);
list_add_tail(&data->domain_node, &domain->clients);
@@ -1231,6 +1232,7 @@ static int exynos_iommu_of_xlate(struct device *dev,
}
list_add_tail(&data->owner_node, &owner->controllers);
+ data->master = dev;
return 0;
}