+/* Find the sas_phy that's attached to this device */
+struct sas_phy *find_local_sas_phy(struct domain_device *dev)
+{
+ struct domain_device *pdev = dev->parent;
+ struct ex_phy *exphy = NULL;
+ int i;
+
+ /* Directly attached device */
+ if (!pdev)
+ return dev->port->phy;
+
+ /* Otherwise look in the expander */
+ for (i = 0; i < pdev->ex_dev.num_phys; i++)
+ if (!memcmp(dev->sas_addr,
+ pdev->ex_dev.ex_phy[i].attached_sas_addr,
+ SAS_ADDR_SIZE)) {
+ exphy = &pdev->ex_dev.ex_phy[i];
+ break;
+ }
+
+ BUG_ON(!exphy);
+ return exphy->phy;
+}
+
+/* Attempt to send a LUN reset message to a device */
+int sas_eh_device_reset_handler(struct scsi_cmnd *cmd)
+{
+ struct domain_device *dev = cmd_to_domain_dev(cmd);
+ struct sas_internal *i =
+ to_sas_internal(dev->port->ha->core.shost->transportt);
+ struct scsi_lun lun;
+ int res;
+
+ int_to_scsilun(cmd->device->lun, &lun);
+
+ if (!i->dft->lldd_lu_reset)
+ return FAILED;
+
+ res = i->dft->lldd_lu_reset(dev, lun.scsi_lun);
+ if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
+ return SUCCESS;
+
+ return FAILED;
+}
+
+/* Attempt to send a phy (bus) reset */
+int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd)
+{
+ struct domain_device *dev = cmd_to_domain_dev(cmd);
+ struct sas_phy *phy = find_local_sas_phy(dev);
+ int res;
+
+ res = sas_phy_reset(phy, 1);
+ if (res)
+ SAS_DPRINTK("Bus reset of %s failed 0x%x\n",
+ phy->dev.kobj.k_name,
+ res);
+ if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
+ return SUCCESS;
+
+ return FAILED;
+}
+
+/* Try to reset a device */
+static int try_to_reset_cmd_device(struct Scsi_Host *shost,
+ struct scsi_cmnd *cmd)
+{
+ int res;
+
+ if (!shost->hostt->eh_device_reset_handler)
+ goto try_bus_reset;
+
+ res = shost->hostt->eh_device_reset_handler(cmd);
+ if (res == SUCCESS)
+ return res;
+
+try_bus_reset:
+ if (shost->hostt->eh_bus_reset_handler)
+ return shost->hostt->eh_bus_reset_handler(cmd);
+
+ return FAILED;
+}
+
+static int sas_eh_handle_sas_errors(struct Scsi_Host *shost,
+ struct list_head *work_q,
+ struct list_head *done_q)