ses: fallback to read SAS address from VPD

The mpt3sas driver does not create a parent end device for PCIe types
where the SAS address is stored, causing the ses driver to not add
PCIe device types connected to a tri-mode HBA. To address this, the
fallback mechanism reads the SAS address from the VPD 0x83 page. This
change is inspired by commit 9927c68.

drivers/scsi/ses.c

@@ -670,10 +670,33 @@ static void ses_match_to_enclosure(struct enclosure_device *edev,
  if (refresh)
  ses_enclosure_data_process(edev, edev_sdev, 0);
 
- if (scsi_is_sas_rphy(sdev->sdev_target->dev.parent))
+ if (scsi_is_sas_rphy(sdev->sdev_target->dev.parent)) {
  efd.addr = sas_get_address(sdev);
- else if (scsi_is_ata(sdev))
+ } else if (scsi_is_ata(sdev)) {
  efd.addr = sdev->host->host_no + 1;
+ } else {
+ const unsigned char *d;
+ const struct scsi_vpd *vpd_pg83;
+ rcu_read_lock();
+ if ((vpd_pg83 = rcu_dereference(sdev->vpd_pg83)) != NULL) {
+ d = vpd_pg83->data + 4;
+ while (d + 12 <= vpd_pg83->data + vpd_pg83->len) {
+ enum scsi_protocol proto = d[0] >> 4;
+ u8 code_set = d[0] & 0x0f;
+ u8 piv = d[1] & 0x80;
+ u8 assoc = (d[1] & 0x30) >> 4;
+ u8 type = d[1] & 0x0f;
+ u8 len = d[3];
+ if (piv && code_set == 1 && assoc == 1 && proto ==
+ SCSI_PROTOCOL_SAS && type == 3 && len == 8) {
+ efd.addr = get_unaligned_be64(&d[4]);
+ break;
+ }
+ d += len + 4;
+ }
+ }
+ rcu_read_unlock();
+ }
 
  if (efd.addr) {
  efd.dev = &sdev->sdev_gendev;