From: Kumar Meiyappan Kumar.Meiyappan@microchip.com
[ Upstream commit cc9befcbbb5ebce77726f938508700d913530035 ]
Correct device count for multi-actuator drives which can cause kernel panics.
Reviewed-by: Scott Benesh scott.benesh@microchip.com Reviewed-by: Scott Teel scott.teel@microchip.com Reviewed-by: Mike Mcgowan mike.mcgowan@microchip.com Reviewed-by: Kevin Barnett kevin.barnett@microchip.com Signed-off-by: Kumar Meiyappan Kumar.Meiyappan@microchip.com Signed-off-by: Don Brace don.brace@microchip.com Link: https://lore.kernel.org/r/166793531872.322537.9003385780343419275.stgit@brun... Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/smartpqi/smartpqi.h | 2 +- drivers/scsi/smartpqi/smartpqi_init.c | 33 +++++++++++++++++++-------- 2 files changed, 25 insertions(+), 10 deletions(-)
diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h index e550b12e525a..c8235f15728b 100644 --- a/drivers/scsi/smartpqi/smartpqi.h +++ b/drivers/scsi/smartpqi/smartpqi.h @@ -1130,7 +1130,7 @@ struct pqi_scsi_dev { u8 phy_id; u8 ncq_prio_enable; u8 ncq_prio_support; - u8 multi_lun_device_lun_count; + u8 lun_count; bool raid_bypass_configured; /* RAID bypass configured */ bool raid_bypass_enabled; /* RAID bypass enabled */ u32 next_bypass_group[RAID_MAP_MAX_DATA_DISKS_PER_ROW]; diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 898b0054cfa1..e011d82172d5 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -1610,9 +1610,7 @@ static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info, &id_phys->alternate_paths_phys_connector, sizeof(device->phys_connector)); device->bay = id_phys->phys_bay_in_box; - device->multi_lun_device_lun_count = id_phys->multi_lun_device_lun_count; - if (!device->multi_lun_device_lun_count) - device->multi_lun_device_lun_count = 1; + device->lun_count = id_phys->multi_lun_device_lun_count; if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) && id_phys->phy_count) device->phy_id = @@ -1746,7 +1744,7 @@ static bool pqi_keep_device_offline(struct pqi_ctrl_info *ctrl_info, return offline; }
-static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info, +static int pqi_get_device_info_phys_logical(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device, struct bmic_identify_physical_device *id_phys) { @@ -1763,6 +1761,20 @@ static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info, return rc; }
+static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, + struct bmic_identify_physical_device *id_phys) +{ + int rc; + + rc = pqi_get_device_info_phys_logical(ctrl_info, device, id_phys); + + if (rc == 0 && device->lun_count == 0) + device->lun_count = 1; + + return rc; +} + static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device) { @@ -1897,7 +1909,7 @@ static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi int rc; int lun;
- for (lun = 0; lun < device->multi_lun_device_lun_count; lun++) { + for (lun = 0; lun < device->lun_count; lun++) { rc = pqi_device_wait_for_pending_io(ctrl_info, device, lun, PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS); if (rc) @@ -2076,6 +2088,7 @@ static void pqi_scsi_update_device(struct pqi_ctrl_info *ctrl_info, existing_device->sas_address = new_device->sas_address; existing_device->queue_depth = new_device->queue_depth; existing_device->device_offline = false; + existing_device->lun_count = new_device->lun_count;
if (pqi_is_logical_device(existing_device)) { existing_device->is_external_raid_device = new_device->is_external_raid_device; @@ -2108,10 +2121,6 @@ static void pqi_scsi_update_device(struct pqi_ctrl_info *ctrl_info, existing_device->phy_connected_dev_type = new_device->phy_connected_dev_type; memcpy(existing_device->box, new_device->box, sizeof(existing_device->box)); memcpy(existing_device->phys_connector, new_device->phys_connector, sizeof(existing_device->phys_connector)); - - existing_device->multi_lun_device_lun_count = new_device->multi_lun_device_lun_count; - if (existing_device->multi_lun_device_lun_count == 0) - existing_device->multi_lun_device_lun_count = 1; } }
@@ -6484,6 +6493,12 @@ static void pqi_slave_destroy(struct scsi_device *sdev) return; }
+ device->lun_count--; + if (device->lun_count > 0) { + mutex_unlock(&ctrl_info->scan_mutex); + return; + } + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); list_del(&device->scsi_device_list_entry); spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);