iommu/omap: Return ERR_PTR in device_group call-back

Make sure that the device_group callback returns an ERR_PTR
instead of NULL.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 95dfca3..641e035 100644 (file)
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1309,7 +1309,7 @@ static void omap_iommu_remove_device(struct device *dev)
 static struct iommu_group *omap_iommu_device_group(struct device *dev)
 {
        struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
-       struct iommu_group *group = NULL;
+       struct iommu_group *group = ERR_PTR(-EINVAL);
 
        if (arch_data->iommu_dev)
                group = arch_data->iommu_dev->group;