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iommu/exynos: Add/remove callbacks should fail if no iommu is available 

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>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Marek Szyprowski 2015-05-19 15:20:32 +02:00 committed by Joerg Roedel
parent 2860af3c8f
commit 06801db0d3
1 changed files with 6 additions and 0 deletions
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6
drivers/iommu/exynos-iommu.c
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@ -1082,6 +1082,9 @@ 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) {
@ -1100,6 +1103,9 @@ 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);
}