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由 Yu Zhao 提交于
For devices attached to the root bus, we can't trigger Secondary Bus Reset because there is no bridge device associated with the bus. So need to check bus->self again NULL first before using it. Reviewed-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: NYu Zhao <yu.zhao@intel.com> Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
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