1 files changed, 20 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/pci-gart.c b/arch/x86_64/kernel/pci-gart.c
index e587b65e754f..12acafdca791 100644
--- a/arch/x86_64/kernel/pci-gart.c
+++ b/arch/x86_64/kernel/pci-gart.c
@@ -571,6 +571,26 @@ static const struct dma_mapping_ops gart_dma_ops = {
         .unmap_sg = gart_unmap_sg,
 };
 
+void gart_iommu_shutdown(void)
+{
+        struct pci_dev *dev;
+        int i;
+
+        if (no_agp && (dma_ops != &gart_dma_ops))
+                return;
+
+        for (i = 0; i < num_k8_northbridges; i++) {
+                u32 ctl;
+
+                dev = k8_northbridges[i];
+                pci_read_config_dword(dev, 0x90, &ctl);
+
+                ctl &= ~1;
+
+                pci_write_config_dword(dev, 0x90, ctl);
+        }
+}
+
 void __init gart_iommu_init(void)
 { 
         struct agp_kern_info info;