powerpc/pseries: Do not need to check for dma_window == NULL

The block in pci_dma_dev_setup_pSeriesLP for dma_window == NULL can be
removed because we will only teminate the loop if we had already allocated
a iommu table for that node or we found a window.  While there may be
no window for the device, the intresting part is if we are reusing a
table or creating it for the first device under it.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index dae3f88..0c1958a 100644 (file)
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -530,12 +530,6 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev)
        }
        pr_debug("  parent is %s\n", pdn->full_name);
 
-       if (dma_window == NULL) {
-               pr_debug("  no dma window for device, linking to parent\n");
-               set_iommu_table_base(&dev->dev, PCI_DN(pdn)->iommu_table);
-               return;
-       }
-
        pci = PCI_DN(pdn);
        if (!pci->iommu_table) {
                tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL,