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-rw-r--r--arch/x86/kernel/amd_iommu.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index b2c309b07427..7c3a95e54ec5 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -155,6 +155,10 @@ static int iommu_init_device(struct device *dev)
pdev = pci_get_bus_and_slot(PCI_BUS(alias), alias & 0xff);
if (pdev)
dev_data->alias = &pdev->dev;
+ else {
+ kfree(dev_data);
+ return -ENOTSUPP;
+ }
atomic_set(&dev_data->bind, 0);
@@ -164,6 +168,20 @@ static int iommu_init_device(struct device *dev)
return 0;
}
+static void iommu_ignore_device(struct device *dev)
+{
+ u16 devid, alias;
+
+ devid = get_device_id(dev);
+ alias = amd_iommu_alias_table[devid];
+
+ memset(&amd_iommu_dev_table[devid], 0, sizeof(struct dev_table_entry));
+ memset(&amd_iommu_dev_table[alias], 0, sizeof(struct dev_table_entry));
+
+ amd_iommu_rlookup_table[devid] = NULL;
+ amd_iommu_rlookup_table[alias] = NULL;
+}
+
static void iommu_uninit_device(struct device *dev)
{
kfree(dev->archdata.iommu);
@@ -193,7 +211,9 @@ int __init amd_iommu_init_devices(void)
continue;
ret = iommu_init_device(&pdev->dev);
- if (ret)
+ if (ret == -ENOTSUPP)
+ iommu_ignore_device(&pdev->dev);
+ else if (ret)
goto out_free;
}