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iommu/vt-d: Unlink device if failed to add to group

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commit f78947c409204138a4bc0609f98e07ef9d01ac0a upstream.

If the device fails to be added to the group, make sure to unlink the
reference before returning.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Fixes: 39ab9555c2 ("iommu: Add sysfs bindings for struct iommu_device")
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jon Derrick 2019-12-31 13:24:20 -07:00 • committed by Greg Kroah-Hartman
commit f9fbac39cf
1 changed files with 10 additions and 3 deletions
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13
drivers/iommu/intel-iommu.c
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@ -5593,8 +5593,10 @@ static int intel_iommu_add_device(struct device *dev)
group = iommu_group_get_for_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
if (IS_ERR(group)) {
ret = PTR_ERR(group);
goto unlink;
}
iommu_group_put(group);
@ -5620,7 +5622,8 @@ static int intel_iommu_add_device(struct device *dev)
if (!get_private_domain_for_dev(dev)) {
dev_warn(dev,
"Failed to get a private domain.\n");
return -ENOMEM;
ret = -ENOMEM;
goto unlink;
}
dev_info(dev,
@ -5635,6 +5638,10 @@ static int intel_iommu_add_device(struct device *dev)
}
return 0;
unlink:
iommu_device_unlink(&iommu->iommu, dev);
return ret;
}
static void intel_iommu_remove_device(struct device *dev)