From: Hiroshi DOYU <[email protected]>

GART Register/Aperture range should be reserved.

Signed-off-by: Hiroshi DOYU <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Lucas Stach <[email protected]>
---
 drivers/iommu/tegra-gart.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index 33a23b6..a431006 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -366,12 +366,18 @@ static int tegra_gart_probe(struct platform_device *pdev)
                return -ENOMEM;
        }
 
-       gart_regs = devm_ioremap(dev, res->start, resource_size(res));
+       gart_regs = devm_request_and_ioremap(dev, res);
        if (!gart_regs) {
                dev_err(dev, "failed to remap GART registers\n");
                return -ENXIO;
        }
 
+       if (!devm_request_mem_region(dev, res_remap->start,
+                                    resource_size(res_remap), dev_name(dev))) {
+               dev_err(dev, "failed to reserve GART aperture\n");
+               return -EBUSY;
+       }
+
        gart->dev = &pdev->dev;
        spin_lock_init(&gart->pte_lock);
        spin_lock_init(&gart->client_lock);
-- 
1.7.5.4

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