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由 Gwendal Grignou 提交于
Keep track of the link on the which the current request is in progress. It allows support of links behind port multiplier. Not all libata-sff is PMP compliant. Code for native BMDMA controller does not take in accound PMP. Tested on Marvell 7042 and Sil7526. Signed-off-by: NGwendal Grignou <gwendal@google.com> Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
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