[PATCH 2/2] powerpc/powernv: Remove duplicate check in tce_iommu_bus_notifier()

[Gavin Shan]

The called function iommu_del_device() checks if the device has
attached IOMMU group, we needn't check it again in the parent
function call tce_iommu_bus_notifier().

Signed-off-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
---
 arch/powerpc/platforms/powernv/pci.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index f91a4e5..b562b0d 100644
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -820,17 +820,18 @@ static int tce_iommu_bus_notifier(struct notifier_block *nb,
 		unsigned long action, void *data)
 {
 	struct device *dev = data;
+	int ret = 0;
 
 	switch (action) {
 	case BUS_NOTIFY_ADD_DEVICE:
-		return iommu_add_device(dev);
+		ret = iommu_add_device(dev);
+		break;
 	case BUS_NOTIFY_DEL_DEVICE:
-		if (dev->iommu_group)
-			iommu_del_device(dev);
-		return 0;
-	default:
-		return 0;
+		iommu_del_device(dev);
+		break;
 	}
+
+	return ret;
 }
 
 static struct notifier_block tce_iommu_bus_nb = {
-- 
1.8.3.2