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scsi: smartpqi: Fix duplicate device nodes for tape changers

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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>
This commit is contained in:
Kevin Barnett 2021-09-28 18:54:40 -05:00 committed by Martin K. Petersen
parent 987d35605b
commit d4dc6aea93
2 changed files with 20 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/scsi/smartpqi/smartpqi.h
View file

@ -1106,6 +1106,7 @@ struct pqi_scsi_dev {
u8 keep_device : 1;
u8 volume_offline : 1;
u8 rescan : 1;
u8 ignore_device : 1;
bool aio_enabled; /* only valid for physical disks */
bool in_remove;
bool device_offline;

23
drivers/scsi/smartpqi/smartpqi_init.c
View file

@ -6297,9 +6297,13 @@ static int pqi_slave_alloc(struct scsi_device *sdev)
rphy = target_to_rphy(starget);
device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
if (device) {
device->target = sdev_id(sdev);
device->lun = sdev->lun;
device->target_lun_valid = true;
if (device->target_lun_valid) {
device->ignore_device = true;
} else {
device->target = sdev_id(sdev);
device->lun = sdev->lun;
device->target_lun_valid = true;
}
}
} else {
device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
@ -6336,14 +6340,25 @@ static int pqi_map_queues(struct Scsi_Host *shost)
ctrl_info->pci_dev, 0);
}
static inline bool pqi_is_tape_changer_device(struct pqi_scsi_dev *device)
{
return device->devtype == TYPE_TAPE || device->devtype == TYPE_MEDIUM_CHANGER;
}
static int pqi_slave_configure(struct scsi_device *sdev)
{
int rc = 0;
struct pqi_scsi_dev *device;
device = sdev->hostdata;
device->devtype = sdev->type;
return 0;
if (pqi_is_tape_changer_device(device) && device->ignore_device) {
rc = -ENXIO;
device->ignore_device = false;
}
return rc;
}
static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)