1 files changed, 323 insertions, 229 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index fef49521cbc3..00d08b25425f 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -50,7 +50,6 @@ static unsigned int max_lun = IBMVFC_MAX_LUN;
 static unsigned int max_targets = IBMVFC_MAX_TARGETS;
 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT;
 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS;
-static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO;
 static unsigned int ibmvfc_debug = IBMVFC_DEBUG;
 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL;
 static LIST_HEAD(ibmvfc_head);
@@ -84,11 +83,6 @@ MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. "
 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Enable driver debug information. "
 		 "[Default=" __stringify(IBMVFC_DEBUG) "]");
-module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC "
-		 "transport should insulate the loss of a remote port. Once this "
-		 "value is exceeded, the scsi target is removed. "
-		 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]");
 module_param_named(log_level, log_level, uint, 0);
 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. "
 		 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]");
@@ -433,6 +427,9 @@ static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt,
 {
 	switch (tgt->action) {
 	case IBMVFC_TGT_ACTION_DEL_RPORT:
+		if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
+			tgt->action = action;
+	case IBMVFC_TGT_ACTION_DELETED_RPORT:
 		break;
 	default:
 		if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
@@ -504,12 +501,23 @@ static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
 		if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
 			vhost->action = action;
 		break;
-	case IBMVFC_HOST_ACTION_LOGO:
 	case IBMVFC_HOST_ACTION_INIT:
 	case IBMVFC_HOST_ACTION_TGT_DEL:
+		switch (vhost->action) {
+		case IBMVFC_HOST_ACTION_RESET:
+		case IBMVFC_HOST_ACTION_REENABLE:
+			break;
+		default:
+			vhost->action = action;
+			break;
+		};
+		break;
+	case IBMVFC_HOST_ACTION_LOGO:
 	case IBMVFC_HOST_ACTION_QUERY_TGTS:
 	case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
 	case IBMVFC_HOST_ACTION_NONE:
+	case IBMVFC_HOST_ACTION_RESET:
+	case IBMVFC_HOST_ACTION_REENABLE:
 	default:
 		vhost->action = action;
 		break;
@@ -641,7 +649,7 @@ static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
  **/
 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
 {
-	long rc;
+	long rc = 0;
 	struct vio_dev *vdev = to_vio_dev(vhost->dev);
 	struct ibmvfc_crq_queue *crq = &vhost->crq;
 
@@ -649,6 +657,8 @@ static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
 	free_irq(vdev->irq, vhost);
 	tasklet_kill(&vhost->tasklet);
 	do {
+		if (rc)
+			msleep(100);
 		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
 	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
 
@@ -667,11 +677,13 @@ static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
  **/
 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
 {
-	int rc;
+	int rc = 0;
 	struct vio_dev *vdev = to_vio_dev(vhost->dev);
 
 	/* Re-enable the CRQ */
 	do {
+		if (rc)
+			msleep(100);
 		rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
 	} while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
 
@@ -690,15 +702,19 @@ static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
  **/
 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
 {
-	int rc;
+	int rc = 0;
+	unsigned long flags;
 	struct vio_dev *vdev = to_vio_dev(vhost->dev);
 	struct ibmvfc_crq_queue *crq = &vhost->crq;
 
 	/* Close the CRQ */
 	do {
+		if (rc)
+			msleep(100);
 		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
 	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
 
+	spin_lock_irqsave(vhost->host->host_lock, flags);
 	vhost->state = IBMVFC_NO_CRQ;
 	vhost->logged_in = 0;
 	ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
@@ -716,6 +732,7 @@ static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
 		dev_warn(vhost->dev, "Partner adapter not ready\n");
 	else if (rc != 0)
 		dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
 
 	return rc;
 }
@@ -821,17 +838,9 @@ static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
  **/
 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
 {
-	int rc;
-
-	scsi_block_requests(vhost->host);
 	ibmvfc_purge_requests(vhost, DID_ERROR);
-	if ((rc = ibmvfc_reset_crq(vhost)) ||
-	    (rc = ibmvfc_send_crq_init(vhost)) ||
-	    (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
-		dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
-		ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
-	} else
-		ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+	ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+	ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
 }
 
 /**
@@ -2024,95 +2033,108 @@ static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
 }
 
 /**
- * ibmvfc_abort_task_set - Abort outstanding commands to the device
- * @sdev:	scsi device to abort commands
- *
- * This sends an Abort Task Set to the VIOS for the specified device. This does
- * NOT send any cancel to the VIOS. That must be done separately.
+ * ibmvfc_match_rport - Match function for specified remote port
+ * @evt:	ibmvfc event struct
+ * @device:	device to match (rport)
  *
  * Returns:
- *	0 on success / other on failure
+ *	1 if event matches rport / 0 if event does not match rport
  **/
-static int ibmvfc_abort_task_set(struct scsi_device *sdev)
+static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
 {
-	struct ibmvfc_host *vhost = shost_priv(sdev->host);
-	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
-	struct ibmvfc_cmd *tmf;
-	struct ibmvfc_event *evt, *found_evt;
-	union ibmvfc_iu rsp_iu;
-	struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
-	int rsp_rc = -EBUSY;
-	unsigned long flags;
-	int rsp_code = 0;
+	struct fc_rport *cmd_rport;
 
-	spin_lock_irqsave(vhost->host->host_lock, flags);
-	found_evt = NULL;
-	list_for_each_entry(evt, &vhost->sent, queue) {
-		if (evt->cmnd && evt->cmnd->device == sdev) {
-			found_evt = evt;
-			break;
-		}
-	}
-
-	if (!found_evt) {
-		if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
-			sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
-		spin_unlock_irqrestore(vhost->host->host_lock, flags);
-		return 0;
-	}
-
-	if (vhost->state == IBMVFC_ACTIVE) {
-		evt = ibmvfc_get_event(vhost);
-		ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
-
-		tmf = &evt->iu.cmd;
-		memset(tmf, 0, sizeof(*tmf));
-		tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
-		tmf->resp.len = sizeof(tmf->rsp);
-		tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
-		tmf->payload_len = sizeof(tmf->iu);
-		tmf->resp_len = sizeof(tmf->rsp);
-		tmf->cancel_key = (unsigned long)sdev->hostdata;
-		tmf->tgt_scsi_id = rport->port_id;
-		int_to_scsilun(sdev->lun, &tmf->iu.lun);
-		tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
-		tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
-		evt->sync_iu = &rsp_iu;
-
-		init_completion(&evt->comp);
-		rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
+	if (evt->cmnd) {
+		cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
+		if (cmd_rport == rport)
+			return 1;
 	}
+	return 0;
+}
 
-	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+/**
+ * ibmvfc_match_target - Match function for specified target
+ * @evt:	ibmvfc event struct
+ * @device:	device to match (starget)
+ *
+ * Returns:
+ *	1 if event matches starget / 0 if event does not match starget
+ **/
+static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
+{
+	if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
+		return 1;
+	return 0;
+}
 
-	if (rsp_rc != 0) {
-		sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
-		return -EIO;
-	}
+/**
+ * ibmvfc_match_lun - Match function for specified LUN
+ * @evt:	ibmvfc event struct
+ * @device:	device to match (sdev)
+ *
+ * Returns:
+ *	1 if event matches sdev / 0 if event does not match sdev
+ **/
+static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
+{
+	if (evt->cmnd && evt->cmnd->device == device)
+		return 1;
+	return 0;
+}
 
-	sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
-	wait_for_completion(&evt->comp);
+/**
+ * ibmvfc_wait_for_ops - Wait for ops to complete
+ * @vhost:	ibmvfc host struct
+ * @device:	device to match (starget or sdev)
+ * @match:	match function
+ *
+ * Returns:
+ *	SUCCESS / FAILED
+ **/
+static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
+			       int (*match) (struct ibmvfc_event *, void *))
+{
+	struct ibmvfc_event *evt;
+	DECLARE_COMPLETION_ONSTACK(comp);
+	int wait;
+	unsigned long flags;
+	signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
 
-	if (rsp_iu.cmd.status)
-		rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
+	ENTER;
+	do {
+		wait = 0;
+		spin_lock_irqsave(vhost->host->host_lock, flags);
+		list_for_each_entry(evt, &vhost->sent, queue) {
+			if (match(evt, device)) {
+				evt->eh_comp = &comp;
+				wait++;
+			}
+		}
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
 
-	if (rsp_code) {
-		if (fc_rsp->flags & FCP_RSP_LEN_VALID)
-			rsp_code = fc_rsp->data.info.rsp_code;
+		if (wait) {
+			timeout = wait_for_completion_timeout(&comp, timeout);
 
-		sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
-			    "flags: %x fcp_rsp: %x, scsi_status: %x\n",
-			    ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
-			    rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
-			    fc_rsp->scsi_status);
-		rsp_rc = -EIO;
-	} else
-		sdev_printk(KERN_INFO, sdev, "Abort successful\n");
+			if (!timeout) {
+				wait = 0;
+				spin_lock_irqsave(vhost->host->host_lock, flags);
+				list_for_each_entry(evt, &vhost->sent, queue) {
+					if (match(evt, device)) {
+						evt->eh_comp = NULL;
+						wait++;
+					}
+				}
+				spin_unlock_irqrestore(vhost->host->host_lock, flags);
+				if (wait)
+					dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
+				LEAVE;
+				return wait ? FAILED : SUCCESS;
+			}
+		}
+	} while (wait);
 
-	spin_lock_irqsave(vhost->host->host_lock, flags);
-	ibmvfc_free_event(evt);
-	spin_unlock_irqrestore(vhost->host->host_lock, flags);
-	return rsp_rc;
+	LEAVE;
+	return SUCCESS;
 }
 
 /**
@@ -2200,88 +2222,130 @@ static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
 }
 
 /**
- * ibmvfc_match_target - Match function for specified target
+ * ibmvfc_match_key - Match function for specified cancel key
  * @evt:	ibmvfc event struct
- * @device:	device to match (starget)
+ * @key:	cancel key to match
  *
  * Returns:
- *	1 if event matches starget / 0 if event does not match starget
+ *	1 if event matches key / 0 if event does not match key
  **/
-static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
+static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
 {
-	if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
-		return 1;
-	return 0;
-}
+	unsigned long cancel_key = (unsigned long)key;
 
-/**
- * ibmvfc_match_lun - Match function for specified LUN
- * @evt:	ibmvfc event struct
- * @device:	device to match (sdev)
- *
- * Returns:
- *	1 if event matches sdev / 0 if event does not match sdev
- **/
-static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
-{
-	if (evt->cmnd && evt->cmnd->device == device)
+	if (evt->crq.format == IBMVFC_CMD_FORMAT &&
+	    evt->iu.cmd.cancel_key == cancel_key)
 		return 1;
 	return 0;
 }
 
 /**
- * ibmvfc_wait_for_ops - Wait for ops to complete
- * @vhost:	ibmvfc host struct
- * @device:	device to match (starget or sdev)
- * @match:	match function
+ * ibmvfc_abort_task_set - Abort outstanding commands to the device
+ * @sdev:	scsi device to abort commands
+ *
+ * This sends an Abort Task Set to the VIOS for the specified device. This does
+ * NOT send any cancel to the VIOS. That must be done separately.
  *
  * Returns:
- *	SUCCESS / FAILED
+ *	0 on success / other on failure
  **/
-static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
-			       int (*match) (struct ibmvfc_event *, void *))
+static int ibmvfc_abort_task_set(struct scsi_device *sdev)
 {
-	struct ibmvfc_event *evt;
-	DECLARE_COMPLETION_ONSTACK(comp);
-	int wait;
-	unsigned long flags;
-	signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
+	struct ibmvfc_host *vhost = shost_priv(sdev->host);
+	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+	struct ibmvfc_cmd *tmf;
+	struct ibmvfc_event *evt, *found_evt;
+	union ibmvfc_iu rsp_iu;
+	struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp;
+	int rc, rsp_rc = -EBUSY;
+	unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
+	int rsp_code = 0;
 
-	ENTER;
-	do {
-		wait = 0;
-		spin_lock_irqsave(vhost->host->host_lock, flags);
-		list_for_each_entry(evt, &vhost->sent, queue) {
-			if (match(evt, device)) {
-				evt->eh_comp = &comp;
-				wait++;
-			}
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	found_evt = NULL;
+	list_for_each_entry(evt, &vhost->sent, queue) {
+		if (evt->cmnd && evt->cmnd->device == sdev) {
+			found_evt = evt;
+			break;
 		}
+	}
+
+	if (!found_evt) {
+		if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
+			sdev_printk(KERN_INFO, sdev, "No events found to abort\n");
 		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		return 0;
+	}
 
-		if (wait) {
-			timeout = wait_for_completion_timeout(&comp, timeout);
+	if (vhost->state == IBMVFC_ACTIVE) {
+		evt = ibmvfc_get_event(vhost);
+		ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
 
-			if (!timeout) {
-				wait = 0;
-				spin_lock_irqsave(vhost->host->host_lock, flags);
-				list_for_each_entry(evt, &vhost->sent, queue) {
-					if (match(evt, device)) {
-						evt->eh_comp = NULL;
-						wait++;
-					}
-				}
-				spin_unlock_irqrestore(vhost->host->host_lock, flags);
-				if (wait)
-					dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
-				LEAVE;
-				return wait ? FAILED : SUCCESS;
-			}
+		tmf = &evt->iu.cmd;
+		memset(tmf, 0, sizeof(*tmf));
+		tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp);
+		tmf->resp.len = sizeof(tmf->rsp);
+		tmf->frame_type = IBMVFC_SCSI_FCP_TYPE;
+		tmf->payload_len = sizeof(tmf->iu);
+		tmf->resp_len = sizeof(tmf->rsp);
+		tmf->cancel_key = (unsigned long)sdev->hostdata;
+		tmf->tgt_scsi_id = rport->port_id;
+		int_to_scsilun(sdev->lun, &tmf->iu.lun);
+		tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF);
+		tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
+		evt->sync_iu = &rsp_iu;
+
+		init_completion(&evt->comp);
+		rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
+	}
+
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
+	if (rsp_rc != 0) {
+		sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc);
+		return -EIO;
+	}
+
+	sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n");
+	timeout = wait_for_completion_timeout(&evt->comp, timeout);
+
+	if (!timeout) {
+		rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
+		if (!rc) {
+			rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
+			if (rc == SUCCESS)
+				rc = 0;
 		}
-	} while (wait);
 
-	LEAVE;
-	return SUCCESS;
+		if (rc) {
+			sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
+			ibmvfc_reset_host(vhost);
+			rsp_rc = 0;
+			goto out;
+		}
+	}
+
+	if (rsp_iu.cmd.status)
+		rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
+
+	if (rsp_code) {
+		if (fc_rsp->flags & FCP_RSP_LEN_VALID)
+			rsp_code = fc_rsp->data.info.rsp_code;
+
+		sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) "
+			    "flags: %x fcp_rsp: %x, scsi_status: %x\n",
+			    ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error),
+			    rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code,
+			    fc_rsp->scsi_status);
+		rsp_rc = -EIO;
+	} else
+		sdev_printk(KERN_INFO, sdev, "Abort successful\n");
+
+out:
+	spin_lock_irqsave(vhost->host->host_lock, flags);
+	ibmvfc_free_event(evt);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+	return rsp_rc;
 }
 
 /**
@@ -2299,6 +2363,7 @@ static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
 	int rc = FAILED;
 
 	ENTER;
+	fc_block_scsi_eh(cmd);
 	ibmvfc_wait_while_resetting(vhost);
 	cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
 	abort_rc = ibmvfc_abort_task_set(sdev);
@@ -2325,6 +2390,7 @@ static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
 	int rc = FAILED;
 
 	ENTER;
+	fc_block_scsi_eh(cmd);
 	ibmvfc_wait_while_resetting(vhost);
 	cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
 	reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
@@ -2337,18 +2403,6 @@ static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
 }
 
 /**
- * ibmvfc_dev_cancel_all_abts - Device iterated cancel all function
- * @sdev:	scsi device struct
- * @data:	return code
- *
- **/
-static void ibmvfc_dev_cancel_all_abts(struct scsi_device *sdev, void *data)
-{
-	unsigned long *rc = data;
-	*rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
-}
-
-/**
  * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
  * @sdev:	scsi device struct
  * @data:	return code
@@ -2361,18 +2415,6 @@ static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
 }
 
 /**
- * ibmvfc_dev_abort_all - Device iterated abort task set function
- * @sdev:	scsi device struct
- * @data:	return code
- *
- **/
-static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
-{
-	unsigned long *rc = data;
-	*rc |= ibmvfc_abort_task_set(sdev);
-}
-
-/**
  * ibmvfc_eh_target_reset_handler - Reset the target
  * @cmd:	scsi command struct
  *
@@ -2389,6 +2431,7 @@ static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
 	unsigned long cancel_rc = 0;
 
 	ENTER;
+	fc_block_scsi_eh(cmd);
 	ibmvfc_wait_while_resetting(vhost);
 	starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
 	reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
@@ -2410,6 +2453,7 @@ static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
 	int rc;
 	struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
 
+	fc_block_scsi_eh(cmd);
 	dev_err(vhost->dev, "Resetting connection due to error recovery\n");
 	rc = ibmvfc_issue_fc_host_lip(vhost->host);
 	return rc ? FAILED : SUCCESS;
@@ -2424,60 +2468,88 @@ static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
  **/
 static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
 {
-	struct scsi_target *starget = to_scsi_target(&rport->dev);
-	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	struct Scsi_Host *shost = rport_to_shost(rport);
 	struct ibmvfc_host *vhost = shost_priv(shost);
-	unsigned long cancel_rc = 0;
-	unsigned long abort_rc = 0;
-	int rc = FAILED;
+	struct fc_rport *dev_rport;
+	struct scsi_device *sdev;
+	unsigned long rc;
 
 	ENTER;
-	starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_abts);
-	starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
+	shost_for_each_device(sdev, shost) {
+		dev_rport = starget_to_rport(scsi_target(sdev));
+		if (dev_rport != rport)
+			continue;
+		ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
+		ibmvfc_abort_task_set(sdev);
+	}
 
-	if (!cancel_rc && !abort_rc)
-		rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
+	rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
 
 	if (rc == FAILED)
 		ibmvfc_issue_fc_host_lip(shost);
 	LEAVE;
 }
 
-static const struct {
-	enum ibmvfc_async_event ae;
-	const char *desc;
-} ae_desc [] = {
-	{ IBMVFC_AE_ELS_PLOGI,		"PLOGI" },
-	{ IBMVFC_AE_ELS_LOGO,		"LOGO" },
-	{ IBMVFC_AE_ELS_PRLO,		"PRLO" },
-	{ IBMVFC_AE_SCN_NPORT,		"N-Port SCN" },
-	{ IBMVFC_AE_SCN_GROUP,		"Group SCN" },
-	{ IBMVFC_AE_SCN_DOMAIN,		"Domain SCN" },
-	{ IBMVFC_AE_SCN_FABRIC,		"Fabric SCN" },
-	{ IBMVFC_AE_LINK_UP,		"Link Up" },
-	{ IBMVFC_AE_LINK_DOWN,		"Link Down" },
-	{ IBMVFC_AE_LINK_DEAD,		"Link Dead" },
-	{ IBMVFC_AE_HALT,			"Halt" },
-	{ IBMVFC_AE_RESUME,		"Resume" },
-	{ IBMVFC_AE_ADAPTER_FAILED,	"Adapter Failed" },
+static const struct ibmvfc_async_desc ae_desc [] = {
+	{ IBMVFC_AE_ELS_PLOGI,		"PLOGI",		IBMVFC_DEFAULT_LOG_LEVEL + 1 },
+	{ IBMVFC_AE_ELS_LOGO,		"LOGO",		IBMVFC_DEFAULT_LOG_LEVEL + 1 },
+	{ IBMVFC_AE_ELS_PRLO,		"PRLO",		IBMVFC_DEFAULT_LOG_LEVEL + 1 },
+	{ IBMVFC_AE_SCN_NPORT,		"N-Port SCN",	IBMVFC_DEFAULT_LOG_LEVEL + 1 },
+	{ IBMVFC_AE_SCN_GROUP,		"Group SCN",	IBMVFC_DEFAULT_LOG_LEVEL + 1 },
+	{ IBMVFC_AE_SCN_DOMAIN,		"Domain SCN",	IBMVFC_DEFAULT_LOG_LEVEL },
+	{ IBMVFC_AE_SCN_FABRIC,		"Fabric SCN",	IBMVFC_DEFAULT_LOG_LEVEL },
+	{ IBMVFC_AE_LINK_UP,		"Link Up",		IBMVFC_DEFAULT_LOG_LEVEL },
+	{ IBMVFC_AE_LINK_DOWN,		"Link Down",	IBMVFC_DEFAULT_LOG_LEVEL },
+	{ IBMVFC_AE_LINK_DEAD,		"Link Dead",	IBMVFC_DEFAULT_LOG_LEVEL },
+	{ IBMVFC_AE_HALT,			"Halt",		IBMVFC_DEFAULT_LOG_LEVEL },
+	{ IBMVFC_AE_RESUME,		"Resume",		IBMVFC_DEFAULT_LOG_LEVEL },
+	{ IBMVFC_AE_ADAPTER_FAILED,	"Adapter Failed",	IBMVFC_DEFAULT_LOG_LEVEL },
 };
 
-static const char *unknown_ae = "Unknown async";
+static const struct ibmvfc_async_desc unknown_ae = {
+	0, "Unknown async", IBMVFC_DEFAULT_LOG_LEVEL
+};
 
 /**
  * ibmvfc_get_ae_desc - Get text description for async event
  * @ae:	async event
  *
  **/
-static const char *ibmvfc_get_ae_desc(u64 ae)
+static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae)
 {
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(ae_desc); i++)
 		if (ae_desc[i].ae == ae)
-			return ae_desc[i].desc;
+			return &ae_desc[i];
 
-	return unknown_ae;
+	return &unknown_ae;
+}
+
+static const struct {
+	enum ibmvfc_ae_link_state state;
+	const char *desc;
+} link_desc [] = {
+	{ IBMVFC_AE_LS_LINK_UP,		" link up" },
+	{ IBMVFC_AE_LS_LINK_BOUNCED,	" link bounced" },
+	{ IBMVFC_AE_LS_LINK_DOWN,	" link down" },
+	{ IBMVFC_AE_LS_LINK_DEAD,	" link dead" },
+};
+
+/**
+ * ibmvfc_get_link_state - Get text description for link state
+ * @state:	link state
+ *
+ **/
+static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(link_desc); i++)
+		if (link_desc[i].state == state)
+			return link_desc[i].desc;
+
+	return "";
 }
 
 /**
@@ -2489,11 +2561,12 @@ static const char *ibmvfc_get_ae_desc(u64 ae)
 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
 				struct ibmvfc_host *vhost)
 {
-	const char *desc = ibmvfc_get_ae_desc(crq->event);
+	const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(crq->event);
 	struct ibmvfc_target *tgt;
 
-	ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx,"
-		   " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name);
+	ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
+		   " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name,
+		   ibmvfc_get_link_state(crq->link_state));
 
 	switch (crq->event) {
 	case IBMVFC_AE_RESUME:
@@ -2606,22 +2679,13 @@ static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
 			dev_info(vhost->dev, "Re-enabling adapter\n");
 			vhost->client_migrated = 1;
 			ibmvfc_purge_requests(vhost, DID_REQUEUE);
-			if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
-			    (rc = ibmvfc_send_crq_init(vhost))) {
-				ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
-				dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
-			} else
-				ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+			ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
 		} else {
 			dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
-
 			ibmvfc_purge_requests(vhost, DID_ERROR);
-			if ((rc = ibmvfc_reset_crq(vhost)) ||
-			    (rc = ibmvfc_send_crq_init(vhost))) {
-				ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
-				dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
-			} else
-				ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+			ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+			ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
 		}
 		return;
 	case IBMVFC_CRQ_CMD_RSP:
@@ -2744,7 +2808,6 @@ static int ibmvfc_target_alloc(struct scsi_target *starget)
 static int ibmvfc_slave_configure(struct scsi_device *sdev)
 {
 	struct Scsi_Host *shost = sdev->host;
-	struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
 	unsigned long flags = 0;
 
 	spin_lock_irqsave(shost->host_lock, flags);
@@ -2756,8 +2819,6 @@ static int ibmvfc_slave_configure(struct scsi_device *sdev)
 		scsi_activate_tcq(sdev, sdev->queue_depth);
 	} else
 		scsi_deactivate_tcq(sdev, sdev->queue_depth);
-
-	rport->dev_loss_tmo = dev_loss_tmo;
 	spin_unlock_irqrestore(shost->host_lock, flags);
 	return 0;
 }
@@ -4123,6 +4184,8 @@ static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
 	case IBMVFC_HOST_ACTION_TGT_DEL:
 	case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
 	case IBMVFC_HOST_ACTION_QUERY:
+	case IBMVFC_HOST_ACTION_RESET:
+	case IBMVFC_HOST_ACTION_REENABLE:
 	default:
 		break;
 	};
@@ -4184,11 +4247,15 @@ static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
 	if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
 		tgt_dbg(tgt, "Deleting rport\n");
 		list_del(&tgt->queue);
+		ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
 		spin_unlock_irqrestore(vhost->host->host_lock, flags);
 		fc_remote_port_delete(rport);
 		del_timer_sync(&tgt->timer);
 		kref_put(&tgt->kref, ibmvfc_release_tgt);
 		return;
+	} else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		return;
 	}
 
 	if (rport) {
@@ -4220,6 +4287,7 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost)
 	struct ibmvfc_target *tgt;
 	unsigned long flags;
 	struct fc_rport *rport;
+	int rc;
 
 	ibmvfc_log_ae(vhost, vhost->events_to_log);
 	spin_lock_irqsave(vhost->host->host_lock, flags);
@@ -4229,6 +4297,29 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost)
 	case IBMVFC_HOST_ACTION_LOGO_WAIT:
 	case IBMVFC_HOST_ACTION_INIT_WAIT:
 		break;
+	case IBMVFC_HOST_ACTION_RESET:
+		vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		rc = ibmvfc_reset_crq(vhost);
+		spin_lock_irqsave(vhost->host->host_lock, flags);
+		if (rc == H_CLOSED)
+			vio_enable_interrupts(to_vio_dev(vhost->dev));
+		else if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
+			 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
+			ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+			dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
+		}
+		break;
+	case IBMVFC_HOST_ACTION_REENABLE:
+		vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
+		spin_unlock_irqrestore(vhost->host->host_lock, flags);
+		rc = ibmvfc_reenable_crq_queue(vhost);
+		spin_lock_irqsave(vhost->host->host_lock, flags);
+		if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
+			ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+			dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
+		}
+		break;
 	case IBMVFC_HOST_ACTION_LOGO:
 		vhost->job_step(vhost);
 		break;
@@ -4266,6 +4357,7 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost)
 				rport = tgt->rport;
 				tgt->rport = NULL;
 				list_del(&tgt->queue);
+				ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
 				spin_unlock_irqrestore(vhost->host->host_lock, flags);
 				if (rport)
 					fc_remote_port_delete(rport);
@@ -4671,6 +4763,8 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	if ((rc = scsi_add_host(shost, dev)))
 		goto release_event_pool;
 
+	fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
+
 	if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj,
 					   &ibmvfc_trace_attr))) {
 		dev_err(dev, "Failed to create trace file. rc=%d\n", rc);