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commit2311ce4d9cupstream. This reverts commit963ba22b90("mpt3sas: Remove phys on topology change") Reverting the previous mpt3sas drives patch changes, since we will observe below issue Issue: Drives connected Enclosure/Expander will unregister with SCSI Transport Layer, if any one remove and add expander cable with in DMD (Device Missing Delay) time period or even any one power-off and power-on the Enclosure with in the DMD period. Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>