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    Subject[PATCH 3/3] iommu/vt-d:Add mutex_unlock() before returning
    Date
    In the probe_acpi_namespace_devices function,when the physical
    node of the acpi device is NULL,the unlock function is missing.
    Add mutex_unlock(&adev->physical_node_lock).

    Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
    Signed-off-by: FelixCuioc <FelixCui-oc@zhaoxin.com>
    ---
    drivers/iommu/intel/iommu.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
    index b31f02f41c96..25e9853cba1b 100644
    --- a/drivers/iommu/intel/iommu.c
    +++ b/drivers/iommu/intel/iommu.c
    @@ -4851,6 +4851,7 @@ static int __init probe_acpi_namespace_devices(void)
    if (pn_dev == NULL) {
    dev->bus->iommu_ops = &intel_iommu_ops;
    ret = iommu_probe_device(dev);
    + mutex_unlock(&adev->physical_node_lock);
    if (ret) {
    pr_err("acpi_device probe fail! ret:%d\n", ret);
    return ret;
    --
    2.17.1
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