Yufen Yu 0d7596a954 scsi: libsas: Add LUN number check in .slave_alloc callback ... [ Upstream commit 49da96d77938db21864dae6b7736b71e96c1d203 ] Offlining a SATA device connected to a hisi SAS controller and then scanning the host will result in detecting 255 non-existent devices: # lsscsi [2:0:0:0] disk ATA Samsung SSD 860 2B6Q /dev/sda [2:0:1:0] disk ATA WDC WD2003FYYS-3 1D01 /dev/sdb [2:0:2:0] disk SEAGATE ST600MM0006 B001 /dev/sdc # echo "offline" > /sys/block/sdb/device/state # echo "- - -" > /sys/class/scsi_host/host2/scan # lsscsi [2:0:0:0] disk ATA Samsung SSD 860 2B6Q /dev/sda [2:0:1:0] disk ATA WDC WD2003FYYS-3 1D01 /dev/sdb [2:0:1:1] disk ATA WDC WD2003FYYS-3 1D01 /dev/sdh ... [2:0:1:255] disk ATA WDC WD2003FYYS-3 1D01 /dev/sdjb After a REPORT LUN command issued to the offline device fails, the SCSI midlayer tries to do a sequential scan of all devices whose LUN number is not 0. However, SATA does not support LUN numbers at all. Introduce a generic sas_slave_alloc() handler which will return -ENXIO for SATA devices if the requested LUN number is larger than 0 and make libsas drivers use this function as their .slave_alloc callback. Link: https://lore.kernel.org/r/20210622034037.1467088-1-yuyufen@huawei.com Reported-by: Wu Bo <wubo40@huawei.com> Suggested-by: John Garry <john.garry@huawei.com> Reviewed-by: John Garry <john.garry@huawei.com> Reviewed-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-07-25 14:36:16 +02:00
..
aic94xx_dev.c
aic94xx_dump.c
aic94xx_dump.h
aic94xx_hwi.c
aic94xx_hwi.h
aic94xx_init.c	scsi: libsas: Add LUN number check in .slave_alloc callback	2021-07-25 14:36:16 +02:00
aic94xx_reg_def.h
aic94xx_reg.c
aic94xx_reg.h
aic94xx_sas.h
aic94xx_scb.c	scsi: libsas: Remove notifier indirection	2021-03-25 09:04:11 +01:00
aic94xx_sds.c
aic94xx_sds.h
aic94xx_seq.c
aic94xx_seq.h
aic94xx_task.c
aic94xx_tmf.c
aic94xx.h
Kconfig
Makefile