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Message-ID: <16507dd1-c461-1615-2c7f-8c04a8456866@oracle.com>
Date: Thu, 30 Sep 2021 13:23:50 -0500
From: john.p.donnelly@...cle.com
To: Don Brace <don.brace@...rochip.com>, hch@...radead.org,
martin.petersen@...cle.com, jejb@...ux.vnet.ibm.com,
linux-scsi@...r.kernel.org
Cc: Kevin.Barnett@...rochip.com, scott.teel@...rochip.com,
Justin.Lindley@...rochip.com, scott.benesh@...rochip.com,
gerry.morong@...rochip.com, mahesh.rajashekhara@...rochip.com,
mike.mcgowen@...rochip.com, murthy.bhat@...rochip.com,
balsundar.p@...rochip.com, joseph.szczypek@....com,
jeff@...onical.com, POSWALD@...e.com, mwilck@...e.com,
pmenzel@...gen.mpg.de, linux-kernel@...r.kernel.org
Subject: Re: [smartpqi updates PATCH V2 07/11] smartpqi: add extended report
physical luns
On 9/28/21 6:54 PM, Don Brace wrote:
> From: Mike McGowen <Mike.McGowen@...rochip.com>
>
> Add support for the new extended formats in
> the data returned from the Report Physical LUNs
> command for controllers that enable this feature.
>
> The new formats allow the reporting of 16-byte WWIDs.
>
> Reviewed-by: Scott Benesh <scott.benesh@...rochip.com>
> Reviewed-by: Scott Teel <scott.teel@...rochip.com>
> Signed-off-by: Mike McGowen <Mike.McGowen@...rochip.com>
> Signed-off-by: Don Brace <don.brace@...rochip.com>
Acked-by: John Donnelly <john.p.donnelly@...cle.com>
> ---
> drivers/scsi/smartpqi/smartpqi.h | 37 +++-
> drivers/scsi/smartpqi/smartpqi_init.c | 163 +++++++++++++-----
> .../scsi/smartpqi/smartpqi_sas_transport.c | 6 +-
> 3 files changed, 147 insertions(+), 59 deletions(-)
>
> diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h
> index d66863f8d1cf..c439583a4ca5 100644
> --- a/drivers/scsi/smartpqi/smartpqi.h
> +++ b/drivers/scsi/smartpqi/smartpqi.h
> @@ -868,7 +868,8 @@ struct pqi_config_table_firmware_features {
> #define PQI_FIRMWARE_FEATURE_RAID_BYPASS_ON_ENCRYPTED_NVME 15
> #define PQI_FIRMWARE_FEATURE_UNIQUE_WWID_IN_REPORT_PHYS_LUN 16
> #define PQI_FIRMWARE_FEATURE_FW_TRIAGE 17
> -#define PQI_FIRMWARE_FEATURE_MAXIMUM 17
> +#define PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5 18
> +#define PQI_FIRMWARE_FEATURE_MAXIMUM 18
>
> struct pqi_config_table_debug {
> struct pqi_config_table_section_header header;
> @@ -943,19 +944,21 @@ struct report_lun_header {
> #define CISS_REPORT_LOG_FLAG_QUEUE_DEPTH (1 << 5)
> #define CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX (1 << 6)
>
> -#define CISS_REPORT_PHYS_FLAG_OTHER (1 << 1)
> +#define CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2 0x2
> +#define CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4 0x4
> +#define CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_MASK 0xf
>
> -struct report_log_lun_extended_entry {
> +struct report_log_lun {
> u8 lunid[8];
> u8 volume_id[16];
> };
>
> -struct report_log_lun_extended {
> +struct report_log_lun_list {
> struct report_lun_header header;
> - struct report_log_lun_extended_entry lun_entries[1];
> + struct report_log_lun lun_entries[1];
> };
>
> -struct report_phys_lun_extended_entry {
> +struct report_phys_lun_8byte_wwid {
> u8 lunid[8];
> __be64 wwid;
> u8 device_type;
> @@ -965,12 +968,27 @@ struct report_phys_lun_extended_entry {
> u32 aio_handle;
> };
>
> +struct report_phys_lun_16byte_wwid {
> + u8 lunid[8];
> + u8 wwid[16];
> + u8 device_type;
> + u8 device_flags;
> + u8 lun_count; /* number of LUNs in a multi-LUN device */
> + u8 redundant_paths;
> + u32 aio_handle;
> +};
> +
> /* for device_flags field of struct report_phys_lun_extended_entry */
> #define CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED 0x8
>
> -struct report_phys_lun_extended {
> +struct report_phys_lun_8byte_wwid_list {
> + struct report_lun_header header;
> + struct report_phys_lun_8byte_wwid lun_entries[1];
> +};
> +
> +struct report_phys_lun_16byte_wwid_list {
> struct report_lun_header header;
> - struct report_phys_lun_extended_entry lun_entries[1];
> + struct report_phys_lun_16byte_wwid lun_entries[1];
> };
>
> struct raid_map_disk_data {
> @@ -1077,7 +1095,7 @@ struct pqi_scsi_dev {
> int target;
> int lun;
> u8 scsi3addr[8];
> - __be64 wwid;
> + u8 wwid[16];
> u8 volume_id[16];
> u8 is_physical_device : 1;
> u8 is_external_raid_device : 1;
> @@ -1316,6 +1334,7 @@ struct pqi_ctrl_info {
> u8 tmf_iu_timeout_supported : 1;
> u8 unique_wwid_in_report_phys_lun_supported : 1;
> u8 firmware_triage_supported : 1;
> + u8 rpl_extended_format_4_5_supported : 1;
> u8 enable_r1_writes : 1;
> u8 enable_r5_writes : 1;
> u8 enable_r6_writes : 1;
> diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
> index c9f2a3d54663..1e27e6ba0159 100644
> --- a/drivers/scsi/smartpqi/smartpqi_init.c
> +++ b/drivers/scsi/smartpqi/smartpqi_init.c
> @@ -572,10 +572,14 @@ static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
> case CISS_REPORT_PHYS:
> request->data_direction = SOP_READ_FLAG;
> cdb[0] = cmd;
> - if (cmd == CISS_REPORT_PHYS)
> - cdb[1] = CISS_REPORT_PHYS_FLAG_OTHER;
> - else
> + if (cmd == CISS_REPORT_PHYS) {
> + if (ctrl_info->rpl_extended_format_4_5_supported)
> + cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4;
> + else
> + cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2;
> + } else {
> cdb[1] = ctrl_info->ciss_report_log_flags;
> + }
> put_unaligned_be32(cdb_length, &cdb[6]);
> break;
> case CISS_GET_RAID_MAP:
> @@ -1132,7 +1136,64 @@ static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
>
> static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
> {
> - return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, buffer);
> + int rc;
> + unsigned int i;
> + u8 rpl_response_format;
> + u32 num_physicals;
> + size_t rpl_16byte_wwid_list_length;
> + void *rpl_list;
> + struct report_lun_header *rpl_header;
> + struct report_phys_lun_8byte_wwid_list *rpl_8byte_wwid_list;
> + struct report_phys_lun_16byte_wwid_list *rpl_16byte_wwid_list;
> +
> + rc = pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, &rpl_list);
> + if (rc)
> + return rc;
> +
> + if (ctrl_info->rpl_extended_format_4_5_supported) {
> + rpl_header = rpl_list;
> + rpl_response_format = rpl_header->flags & CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_MASK;
> + if (rpl_response_format == CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4) {
> + *buffer = rpl_list;
> + return 0;
> + } else if (rpl_response_format != CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2) {
> + dev_err(&ctrl_info->pci_dev->dev,
> + "RPL returned unsupported data format %u\n",
> + rpl_response_format);
> + return -EINVAL;
> + } else {
> + dev_warn(&ctrl_info->pci_dev->dev,
> + "RPL returned extended format 2 instead of 4\n");
> + }
> + }
> +
> + rpl_8byte_wwid_list = rpl_list;
> + num_physicals = get_unaligned_be32(&rpl_8byte_wwid_list->header.list_length) / sizeof(rpl_8byte_wwid_list->lun_entries[0]);
> + rpl_16byte_wwid_list_length = sizeof(struct report_lun_header) + (num_physicals * sizeof(struct report_phys_lun_16byte_wwid));
> +
> + rpl_16byte_wwid_list = kmalloc(rpl_16byte_wwid_list_length, GFP_KERNEL);
> + if (!rpl_16byte_wwid_list)
> + return -ENOMEM;
> +
> + put_unaligned_be32(num_physicals * sizeof(struct report_phys_lun_16byte_wwid),
> + &rpl_16byte_wwid_list->header.list_length);
> + rpl_16byte_wwid_list->header.flags = rpl_8byte_wwid_list->header.flags;
> +
> + for (i = 0; i < num_physicals; i++) {
> + memcpy(&rpl_16byte_wwid_list->lun_entries[i].lunid, &rpl_8byte_wwid_list->lun_entries[i].lunid, sizeof(rpl_8byte_wwid_list->lun_entries[i].lunid));
> + memset(&rpl_16byte_wwid_list->lun_entries[i].wwid, 0, 8);
> + memcpy(&rpl_16byte_wwid_list->lun_entries[i].wwid[8], &rpl_8byte_wwid_list->lun_entries[i].wwid, sizeof(rpl_8byte_wwid_list->lun_entries[i].wwid));
> + rpl_16byte_wwid_list->lun_entries[i].device_type = rpl_8byte_wwid_list->lun_entries[i].device_type;
> + rpl_16byte_wwid_list->lun_entries[i].device_flags = rpl_8byte_wwid_list->lun_entries[i].device_flags;
> + rpl_16byte_wwid_list->lun_entries[i].lun_count = rpl_8byte_wwid_list->lun_entries[i].lun_count;
> + rpl_16byte_wwid_list->lun_entries[i].redundant_paths = rpl_8byte_wwid_list->lun_entries[i].redundant_paths;
> + rpl_16byte_wwid_list->lun_entries[i].aio_handle = rpl_8byte_wwid_list->lun_entries[i].aio_handle;
> + }
> +
> + kfree(rpl_8byte_wwid_list);
> + *buffer = rpl_16byte_wwid_list;
> +
> + return 0;
> }
>
> static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
> @@ -1141,14 +1202,14 @@ static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void
> }
>
> static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
> - struct report_phys_lun_extended **physdev_list,
> - struct report_log_lun_extended **logdev_list)
> + struct report_phys_lun_16byte_wwid_list **physdev_list,
> + struct report_log_lun_list **logdev_list)
> {
> int rc;
> size_t logdev_list_length;
> size_t logdev_data_length;
> - struct report_log_lun_extended *internal_logdev_list;
> - struct report_log_lun_extended *logdev_data;
> + struct report_log_lun_list *internal_logdev_list;
> + struct report_log_lun_list *logdev_data;
> struct report_lun_header report_lun_header;
>
> rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
> @@ -1173,7 +1234,7 @@ static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
> } else {
> memset(&report_lun_header, 0, sizeof(report_lun_header));
> logdev_data =
> - (struct report_log_lun_extended *)&report_lun_header;
> + (struct report_log_lun_list *)&report_lun_header;
> logdev_list_length = 0;
> }
>
> @@ -1181,7 +1242,7 @@ static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
> logdev_list_length;
>
> internal_logdev_list = kmalloc(logdev_data_length +
> - sizeof(struct report_log_lun_extended), GFP_KERNEL);
> + sizeof(struct report_log_lun), GFP_KERNEL);
> if (!internal_logdev_list) {
> kfree(*logdev_list);
> *logdev_list = NULL;
> @@ -1190,9 +1251,9 @@ static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
>
> memcpy(internal_logdev_list, logdev_data, logdev_data_length);
> memset((u8 *)internal_logdev_list + logdev_data_length, 0,
> - sizeof(struct report_log_lun_extended_entry));
> + sizeof(struct report_log_lun));
> put_unaligned_be32(logdev_list_length +
> - sizeof(struct report_log_lun_extended_entry),
> + sizeof(struct report_log_lun),
> &internal_logdev_list->header.list_length);
>
> kfree(*logdev_list);
> @@ -1845,7 +1906,7 @@ static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, struct pqi_scsi_d
> return false;
>
> if (dev1->is_physical_device)
> - return dev1->wwid == dev2->wwid;
> + return memcmp(dev1->wwid, dev2->wwid, sizeof(dev1->wwid)) == 0;
>
> return memcmp(dev1->volume_id, dev2->volume_id, sizeof(dev1->volume_id)) == 0;
> }
> @@ -1915,7 +1976,9 @@ static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
> else
> count += scnprintf(buffer + count,
> PQI_DEV_INFO_BUFFER_LENGTH - count,
> - " %016llx", device->sas_address);
> + " %016llx%016llx",
> + get_unaligned_be64(&device->wwid[0]),
> + get_unaligned_be64(&device->wwid[8]));
>
> count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
> " %s %.8s %.16s ",
> @@ -2229,13 +2292,14 @@ static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
> }
>
> static inline void pqi_set_physical_device_wwid(struct pqi_ctrl_info *ctrl_info,
> - struct pqi_scsi_dev *device, struct report_phys_lun_extended_entry *phys_lun_ext_entry)
> + struct pqi_scsi_dev *device, struct report_phys_lun_16byte_wwid *phys_lun)
> {
> if (ctrl_info->unique_wwid_in_report_phys_lun_supported ||
> + ctrl_info->rpl_extended_format_4_5_supported ||
> pqi_is_device_with_sas_address(device))
> - device->wwid = phys_lun_ext_entry->wwid;
> + memcpy(device->wwid, phys_lun->wwid, sizeof(device->wwid));
> else
> - device->wwid = cpu_to_be64(get_unaligned_be64(&device->page_83_identifier));
> + memcpy(&device->wwid[8], device->page_83_identifier, 8);
> }
>
> static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
> @@ -2243,10 +2307,10 @@ static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
> int i;
> int rc;
> LIST_HEAD(new_device_list_head);
> - struct report_phys_lun_extended *physdev_list = NULL;
> - struct report_log_lun_extended *logdev_list = NULL;
> - struct report_phys_lun_extended_entry *phys_lun_ext_entry;
> - struct report_log_lun_extended_entry *log_lun_ext_entry;
> + struct report_phys_lun_16byte_wwid_list *physdev_list = NULL;
> + struct report_log_lun_list *logdev_list = NULL;
> + struct report_phys_lun_16byte_wwid *phys_lun;
> + struct report_log_lun *log_lun;
> struct bmic_identify_physical_device *id_phys = NULL;
> u32 num_physicals;
> u32 num_logicals;
> @@ -2297,10 +2361,9 @@ static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
>
> if (pqi_hide_vsep) {
> for (i = num_physicals - 1; i >= 0; i--) {
> - phys_lun_ext_entry =
> - &physdev_list->lun_entries[i];
> - if (CISS_GET_DRIVE_NUMBER(phys_lun_ext_entry->lunid) == PQI_VSEP_CISS_BTL) {
> - pqi_mask_device(phys_lun_ext_entry->lunid);
> + phys_lun = &physdev_list->lun_entries[i];
> + if (CISS_GET_DRIVE_NUMBER(phys_lun->lunid) == PQI_VSEP_CISS_BTL) {
> + pqi_mask_device(phys_lun->lunid);
> break;
> }
> }
> @@ -2344,16 +2407,14 @@ static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
> if ((!pqi_expose_ld_first && i < num_physicals) ||
> (pqi_expose_ld_first && i >= num_logicals)) {
> is_physical_device = true;
> - phys_lun_ext_entry =
> - &physdev_list->lun_entries[physical_index++];
> - log_lun_ext_entry = NULL;
> - scsi3addr = phys_lun_ext_entry->lunid;
> + phys_lun = &physdev_list->lun_entries[physical_index++];
> + log_lun = NULL;
> + scsi3addr = phys_lun->lunid;
> } else {
> is_physical_device = false;
> - phys_lun_ext_entry = NULL;
> - log_lun_ext_entry =
> - &logdev_list->lun_entries[logical_index++];
> - scsi3addr = log_lun_ext_entry->lunid;
> + phys_lun = NULL;
> + log_lun = &logdev_list->lun_entries[logical_index++];
> + scsi3addr = log_lun->lunid;
> }
>
> if (is_physical_device && pqi_skip_device(scsi3addr))
> @@ -2368,7 +2429,7 @@ static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
> memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
> device->is_physical_device = is_physical_device;
> if (is_physical_device) {
> - device->device_type = phys_lun_ext_entry->device_type;
> + device->device_type = phys_lun->device_type;
> if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
> device->is_expander_smp_device = true;
> } else {
> @@ -2393,8 +2454,9 @@ static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
> if (rc) {
> if (device->is_physical_device)
> dev_warn(&ctrl_info->pci_dev->dev,
> - "obtaining device info failed, skipping physical device %016llx\n",
> - get_unaligned_be64(&phys_lun_ext_entry->wwid));
> + "obtaining device info failed, skipping physical device %016llx%016llx\n",
> + get_unaligned_be64(&phys_lun->wwid[0]),
> + get_unaligned_be64(&phys_lun->wwid[8]));
> else
> dev_warn(&ctrl_info->pci_dev->dev,
> "obtaining device info failed, skipping logical device %08x%08x\n",
> @@ -2407,21 +2469,21 @@ static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
> pqi_assign_bus_target_lun(device);
>
> if (device->is_physical_device) {
> - pqi_set_physical_device_wwid(ctrl_info, device, phys_lun_ext_entry);
> - if ((phys_lun_ext_entry->device_flags &
> + pqi_set_physical_device_wwid(ctrl_info, device, phys_lun);
> + if ((phys_lun->device_flags &
> CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
> - phys_lun_ext_entry->aio_handle) {
> + phys_lun->aio_handle) {
> device->aio_enabled = true;
> device->aio_handle =
> - phys_lun_ext_entry->aio_handle;
> + phys_lun->aio_handle;
> }
> } else {
> - memcpy(device->volume_id, log_lun_ext_entry->volume_id,
> + memcpy(device->volume_id, log_lun->volume_id,
> sizeof(device->volume_id));
> }
>
> if (pqi_is_device_with_sas_address(device))
> - device->sas_address = get_unaligned_be64(&device->wwid);
> + device->sas_address = get_unaligned_be64(&device->wwid[8]);
>
> new_device_list[num_valid_devices++] = device;
> }
> @@ -6804,12 +6866,10 @@ static ssize_t pqi_unique_id_show(struct device *dev,
> return -ENODEV;
> }
>
> - if (device->is_physical_device) {
> - memset(unique_id, 0, 8);
> - memcpy(unique_id + 8, &device->wwid, sizeof(device->wwid));
> - } else {
> + if (device->is_physical_device)
> + memcpy(unique_id, device->wwid, sizeof(device->wwid));
> + else
> memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
> - }
>
> spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
>
> @@ -7443,6 +7503,9 @@ static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
> ctrl_info->firmware_triage_supported = firmware_feature->enabled;
> pqi_save_fw_triage_setting(ctrl_info, firmware_feature->enabled);
> break;
> + case PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5:
> + ctrl_info->rpl_extended_format_4_5_supported = firmware_feature->enabled;
> + break;
> }
>
> pqi_firmware_feature_status(ctrl_info, firmware_feature);
> @@ -7543,6 +7606,11 @@ static struct pqi_firmware_feature pqi_firmware_features[] = {
> .feature_bit = PQI_FIRMWARE_FEATURE_FW_TRIAGE,
> .feature_status = pqi_ctrl_update_feature_flags,
> },
> + {
> + .feature_name = "RPL Extended Formats 4 and 5",
> + .feature_bit = PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5,
> + .feature_status = pqi_ctrl_update_feature_flags,
> + },
> };
>
> static void pqi_process_firmware_features(
> @@ -7644,6 +7712,7 @@ static void pqi_ctrl_reset_config(struct pqi_ctrl_info *ctrl_info)
> ctrl_info->tmf_iu_timeout_supported = false;
> ctrl_info->unique_wwid_in_report_phys_lun_supported = false;
> ctrl_info->firmware_triage_supported = false;
> + ctrl_info->rpl_extended_format_4_5_supported = false;
> }
>
> static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
> diff --git a/drivers/scsi/smartpqi/smartpqi_sas_transport.c b/drivers/scsi/smartpqi/smartpqi_sas_transport.c
> index afd9bafebd1d..dea4ebaf1677 100644
> --- a/drivers/scsi/smartpqi/smartpqi_sas_transport.c
> +++ b/drivers/scsi/smartpqi/smartpqi_sas_transport.c
> @@ -343,7 +343,7 @@ static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
> }
>
> if (found_device->devtype == TYPE_ENCLOSURE) {
> - *identifier = get_unaligned_be64(&found_device->wwid);
> + *identifier = get_unaligned_be64(&found_device->wwid[8]);
> rc = 0;
> goto out;
> }
> @@ -364,7 +364,7 @@ static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
> memcmp(device->phys_connector,
> found_device->phys_connector, 2) == 0) {
> *identifier =
> - get_unaligned_be64(&device->wwid);
> + get_unaligned_be64(&device->wwid[8]);
> rc = 0;
> goto out;
> }
> @@ -380,7 +380,7 @@ static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
> if (device->devtype == TYPE_ENCLOSURE &&
> CISS_GET_DRIVE_NUMBER(device->scsi3addr) ==
> PQI_VSEP_CISS_BTL) {
> - *identifier = get_unaligned_be64(&device->wwid);
> + *identifier = get_unaligned_be64(&device->wwid[8]);
> rc = 0;
> goto out;
> }
>
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