scsi: megaraid_sas: Update max supported LD IDs to 240

[ Upstream commit 1881090dbaf133c3af9f51f25d8936c5d71ff4da ]

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: 4d5cbca6306a ("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>

diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index 4919ea54b8277b9c847d40107b501a759fa02037..2ef9d41fc6f42ccea1bfbfff552ab9089bdba210 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -1519,6 +1519,8 @@ struct megasas_ctrl_info {
 #define MEGASAS_MAX_LD_IDS                     (MEGASAS_MAX_LD_CHANNELS * \
                                                MEGASAS_MAX_DEV_PER_CHANNEL)
 
+#define MEGASAS_MAX_SUPPORTED_LD_IDS           240
+
 #define MEGASAS_MAX_SECTORS                    (2*1024)
 #define MEGASAS_MAX_SECTORS_IEEE               (2*128)
 #define MEGASAS_DBG_LVL                                1

diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c
index da1cad1ee12389053fec297e2f9da723d2145fb6..4463a538102ad6d7fb1b1d266ae8a3273d38a173 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_fp.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fp.c
@@ -358,7 +358,7 @@ u8 MR_ValidateMapInfo(struct megasas_instance *instance, u64 map_id)
                ld = MR_TargetIdToLdGet(i, drv_map);
 
                /* For non existing VDs, iterate to next VD*/
-               if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1))
+               if (ld >= MEGASAS_MAX_SUPPORTED_LD_IDS)
                        continue;
 
                raid = MR_LdRaidGet(ld, drv_map);