When a reconnect failed but re-login succeeded, __scsi_add_device was
called again.
In those cases, __scsi_add_device succeeded and returned the pointer to
the existing scsi_device. fw-sbp2 then continued orderly, except that
it missed to call sbp2_cancel_orbs. SCSI core would call fw-sbp2's
eh_abort_handler eventually if there had been an outstanding command.
This patch avoids the needless lookups and temporary allocations in SCSI
core and I/O stall and timeout until eh_abort_handler hits.
Also, __scsi_add_device tolerating calls for devices which already exist
is undocumented behavior on which we shouldn't rely.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jarod Wilson <jwilson@redhat.com>
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