scsi: megaraid_sas: Update max supported LD IDs to 240
authorChandrakanth Patil <chandrakanth.patil@broadcom.com>
Thu, 2 Mar 2023 10:53:40 +0000 (16:23 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 17 Mar 2023 07:50:27 +0000 (08:50 +0100)
commit8f45d2f32c34d1d1bb07408e4585d921f873aa65
tree3f4f5ff63a558e74b8ed5bc5ff98278b76860b27
parent715396cca2ce2df9149054fb6fabc8d27d8b9d8e
scsi: megaraid_sas: Update max supported LD IDs to 240

[ Upstream commit bfa659177dcba48cf13f2bd88c1972f12a60bf1c ]

The firmware only supports Logical Disk IDs up to 240 and LD ID 255 (0xFF)
is reserved for deleted LDs. However, in some cases, firmware was assigning
LD ID 254 (0xFE) to deleted LDs and this was causing the driver to mark the
wrong disk as deleted. This in turn caused the wrong disk device to be
taken offline by the SCSI midlayer.

To address this issue, limit the LD ID range from 255 to 240. This ensures
the deleted LD ID is properly identified and removed by the driver without
accidently deleting any valid LDs.

Fixes: ae6874ba4b43 ("scsi: megaraid_sas: Early detection of VD deletion through RaidMap update")
Reported-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Chandrakanth Patil <chandrakanth.patil@broadcom.com>
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Link: https://lore.kernel.org/r/20230302105342.34933-2-chandrakanth.patil@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/scsi/megaraid/megaraid_sas.h
drivers/scsi/megaraid/megaraid_sas_fp.c