powerpc/pseries: iommu cleanup

No need to initialize per-cpu pointer to NULL, it is the default.

Direct dma ops and no setup are the defaults, no need to set for
iommu-off.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Reviewed-by: Grant Likely <grant.likely@secretlab.ca>
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 fa2906a..9fecb31 100644 (file)
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -140,7 +140,7 @@ static int tce_build_pSeriesLP(struct iommu_table *tbl, long tcenum,
        return ret;
 }
 
-static DEFINE_PER_CPU(u64 *, tce_page) = NULL;
+static DEFINE_PER_CPU(u64 *, tce_page);
 
 static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
                                     long npages, unsigned long uaddr,
@@ -589,13 +589,8 @@ static struct notifier_block iommu_reconfig_nb = {
 /* These are called very early. */
 void iommu_init_early_pSeries(void)
 {
-       if (of_chosen && of_get_property(of_chosen, "linux,iommu-off", NULL)) {
-               /* Direct I/O, IOMMU off */
-               ppc_md.pci_dma_dev_setup = NULL;
-               ppc_md.pci_dma_bus_setup = NULL;
-               set_pci_dma_ops(&dma_direct_ops);
+       if (of_chosen && of_get_property(of_chosen, "linux,iommu-off", NULL))
                return;
-       }
 
        if (firmware_has_feature(FW_FEATURE_LPAR)) {
                if (firmware_has_feature(FW_FEATURE_MULTITCE)) {