From a8daac8a517dacfea951424f67c1f07e1f76b2ad Mon Sep 17 00:00:00 2001
From: Nishanth Aravamudan <nacc@us.ibm.com>
Date: Mon, 18 Oct 2010 07:27:03 +0000
Subject: [PATCH] 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>
---
arch/powerpc/platforms/pseries/iommu.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index fa2906a103dd..9fecb313a4c9 100644
--- 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)) {
--
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