linux/drivers/scsi/smartpqi
Kevin Barnett d4dc6aea93 scsi: smartpqi: Fix duplicate device nodes for tape changers
Stop the OS from re-discovering multiple LUNs for tape drive and medium
changer.

Duplicate device nodes for Ultrium tape drive and medium changer are being
created.

The Ultrium tape drive is a multi-LUN SCSI target.  It presents a LUN for
the tape drive and a 2nd LUN for the medium changer.  Our controller FW
lists both LUNs in the RPL results.

As a result, the smartpqi driver exposes both devices to the OS. Then the
OS does its normal device discovery via the SCSI REPORT LUNS command, which
causes it to re-discover both devices a 2nd time, which results in the
duplicate device nodes.

Link: https://lore.kernel.org/r/20210928235442.201875-10-don.brace@microchip.com
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Acked-by: John Donnelly <john.p.donnelly@oracle.com>
Signed-off-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-05 00:13:15 -04:00
..
Kconfig scsi: smartpqi: Change Kconfig menu entry to Microchip 2021-07-19 22:00:56 -04:00
Makefile scsi: smartpqi: add spdx 2019-03-18 16:48:28 -04:00
smartpqi_init.c scsi: smartpqi: Fix duplicate device nodes for tape changers 2021-10-05 00:13:15 -04:00
smartpqi_sas_transport.c scsi: smartpqi: Add extended report physical LUNs 2021-10-05 00:13:15 -04:00
smartpqi_sis.c scsi: smartpqi: Capture controller reason codes 2021-10-05 00:13:14 -04:00
smartpqi_sis.h scsi: smartpqi: Capture controller reason codes 2021-10-05 00:13:14 -04:00
smartpqi.h scsi: smartpqi: Fix duplicate device nodes for tape changers 2021-10-05 00:13:15 -04:00