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
..
host.c	scsi: isci: Remove set but not used 'index'	2020-09-01 22:16:14 -04:00
host.h
init.c	scsi: libsas: Add LUN number check in .slave_alloc callback	2021-07-25 14:36:16 +02:00
isci.h	scsi: isci: Use true, false for bool variables	2020-04-24 18:21:15 -04:00
Makefile
phy.c	SCSI misc on 20201013	2020-10-14 15:15:35 -07:00
phy.h
port_config.c
port.c	scsi: isci: Pass gfp_t flags in isci_port_bc_change_received()	2021-03-25 09:04:12 +01:00
port.h
probe_roms.c
probe_roms.h
registers.h
remote_device.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
remote_device.h
remote_node_context.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
remote_node_context.h
remote_node_table.c
remote_node_table.h	scsi: isci: Fix a typo in a comment	2020-10-07 23:50:04 -04:00
request.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
request.h
sas.h
scu_completion_codes.h
scu_event_codes.h
scu_remote_node_context.h
scu_task_context.h
task.c
task.h
unsolicited_frame_control.c
unsolicited_frame_control.h