We hack into PCI_EXP_LNKCAP to support device fast plug/unplug for pcie-root-port. However some devices like ioh3420 does not suport it, so PCI_EXP_LNKCAP is not set for such devices. Signed-off-by: Ying Fang <fangying1@huawei.com> Signed-off-by: Yan Wang <wangyan122@huawei.com>
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