From: Dan Williams <dan.j.williams@intel.com>
Date: Thu, 31 Mar 2011 20:10:44 +0000 (-0700)
Subject: isci: fix fragile/conditional isci_host lookups
X-Git-Tag: v3.0-rc6~1^2~1^2~181
X-Git-Url: http://git.samba.org/samba.git/?a=commitdiff_plain;h=4393aa4e6b9517a666f0ef6b774fd421a9dc4c68;p=sfrench%2Fcifs-2.6.git

isci: fix fragile/conditional isci_host lookups

A domain_device can always reference back to ->lldd_ha unlike local lldd
structures.  Fix up cases where the driver uses local objects to look up the
isci_host.  This also changes the calling conventions of some routines to
expect a valid isci_host parameter rather than re-lookup the pointer on entry.

Incidentally cleans up some macros that are longer to type than the open-coded
equivalent:
  isci_host_from_sas_ha
  isci_dev_from_domain_dev

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index 79515be5f7c1..66449593aa8c 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -129,7 +129,7 @@ void isci_host_start_complete(struct isci_host *ihost, enum sci_status completio
 
 int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time)
 {
-	struct isci_host *ihost = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost));
+	struct isci_host *ihost = SHOST_TO_SAS_HA(shost)->lldd_ha;
 
 	if (test_bit(IHOST_START_PENDING, &ihost->flags))
 		return 0;
@@ -149,7 +149,7 @@ int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time)
 
 void isci_host_scan_start(struct Scsi_Host *shost)
 {
-	struct isci_host *ihost = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost));
+	struct isci_host *ihost = SHOST_TO_SAS_HA(shost)->lldd_ha;
 	struct scic_sds_controller *scic = ihost->core_controller;
 	unsigned long tmo = scic_controller_get_suggested_start_timeout(scic);
 
diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index d012b69d8d61..8372094ef5ad 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -233,15 +233,10 @@ static inline void wait_for_device_stop(struct isci_host *ihost, struct isci_rem
 	wait_event(ihost->eventq, !test_bit(IDEV_STOP_PENDING, &idev->flags));
 }
 
-/**
- * isci_host_from_sas_ha() - This accessor retrieves the isci_host object
- *    reference from the Linux sas_ha_struct reference.
- * @ha_struct,: This parameter points to the Linux sas_ha_struct object
- *
- * A reference to the associated isci_host structure.
- */
-#define isci_host_from_sas_ha(ha_struct) \
-	((struct isci_host *)(ha_struct)->lldd_ha)
+static inline struct isci_host *dev_to_ihost(struct domain_device *dev)
+{
+	return dev->port->ha->lldd_ha;
+}
 
 /**
  * isci_host_scan_finished() -
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index decc0c05a3dd..9e081a4c8a3c 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -163,7 +163,7 @@ int isci_phy_control(struct asd_sas_phy *sas_phy,
 			return -ENODEV;
 
 		/* Perform the port reset. */
-		ret = isci_port_perform_hard_reset(iport, iphy);
+		ret = isci_port_perform_hard_reset(ihost, iport, iphy);
 
 		break;
 
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c
index 74dc96dc6b17..b675a94f4a73 100644
--- a/drivers/scsi/isci/port.c
+++ b/drivers/scsi/isci/port.c
@@ -400,55 +400,43 @@ void isci_port_hard_reset_complete(struct isci_port *isci_port,
 
 	complete_all(&isci_port->hard_reset_complete);
 }
-/**
- * isci_port_perform_hard_reset() - This function is one of the SAS Domain
- *    Template functions. This is a phy management function.
- * @isci_port:
- * @isci_phy:
- *
- * status, TMF_RESP_FUNC_COMPLETE indicates success.
- */
-int isci_port_perform_hard_reset(
-	struct isci_port *isci_port,
-	struct isci_phy *isci_phy)
+
+int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
+				 struct isci_phy *iphy)
 {
+	unsigned long flags;
 	enum sci_status status;
 	int ret = TMF_RESP_FUNC_COMPLETE;
-	unsigned long flags;
 
+	dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
+		__func__, iport);
 
-	dev_dbg(&isci_port->isci_host->pdev->dev,
-		"%s: isci_port = %p\n",
-		__func__, isci_port);
-
-	BUG_ON(isci_port == NULL);
-
-	init_completion(&isci_port->hard_reset_complete);
+	init_completion(&iport->hard_reset_complete);
 
-	spin_lock_irqsave(&isci_port->isci_host->scic_lock, flags);
+	spin_lock_irqsave(&ihost->scic_lock, flags);
 
 	#define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
-	status = scic_port_hard_reset(isci_port->sci_port_handle,
+	status = scic_port_hard_reset(iport->sci_port_handle,
 				      ISCI_PORT_RESET_TIMEOUT);
 
-	spin_unlock_irqrestore(&isci_port->isci_host->scic_lock, flags);
+	spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
 	if (status == SCI_SUCCESS) {
-		wait_for_completion(&isci_port->hard_reset_complete);
+		wait_for_completion(&iport->hard_reset_complete);
 
-		dev_dbg(&isci_port->isci_host->pdev->dev,
-			"%s: isci_port = %p; hard reset completion\n",
-			__func__, isci_port);
+		dev_dbg(&ihost->pdev->dev,
+			"%s: iport = %p; hard reset completion\n",
+			__func__, iport);
 
-		if (isci_port->hard_reset_status != SCI_SUCCESS)
+		if (iport->hard_reset_status != SCI_SUCCESS)
 			ret = TMF_RESP_FUNC_FAILED;
 	} else {
 		ret = TMF_RESP_FUNC_FAILED;
 
-		dev_err(&isci_port->isci_host->pdev->dev,
-			"%s: isci_port = %p; scic_port_hard_reset call"
+		dev_err(&ihost->pdev->dev,
+			"%s: iport = %p; scic_port_hard_reset call"
 			" failed 0x%x\n",
-			__func__, isci_port, status);
+			__func__, iport, status);
 
 	}
 
@@ -456,19 +444,12 @@ int isci_port_perform_hard_reset(
 	 * the same as link failures on all phys in the port.
 	 */
 	if (ret != TMF_RESP_FUNC_COMPLETE) {
-		BUG_ON(isci_port->isci_host == NULL);
-
-		dev_err(&isci_port->isci_host->pdev->dev,
-			"%s: isci_port = %p; hard reset failed "
+		dev_err(&ihost->pdev->dev,
+			"%s: iport = %p; hard reset failed "
 			"(0x%x) - sending link down to libsas for phy %p\n",
-			__func__,
-			isci_port,
-			isci_port->hard_reset_status,
-			isci_phy);
-
-		isci_port_link_down(isci_port->isci_host,
-				    isci_phy,
-				    isci_port);
+			__func__, iport, iport->hard_reset_status, iphy);
+
+		isci_port_link_down(ihost, iphy, iport);
 	}
 
 	return ret;
@@ -491,8 +472,7 @@ void isci_port_invalid_link_up(struct scic_sds_controller *scic,
 				      struct scic_sds_port *sci_port,
 				      struct scic_sds_phy *phy)
 {
-	struct isci_host *ihost =
-		(struct isci_host *)sci_object_get_association(scic);
+	struct isci_host *ihost = sci_object_get_association(scic);
 
 	dev_warn(&ihost->pdev->dev, "Invalid link up!\n");
 }
diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h
index dfdd12a0f68e..76546fd5b7d0 100644
--- a/drivers/scsi/isci/port.h
+++ b/drivers/scsi/isci/port.h
@@ -143,9 +143,8 @@ void isci_port_hard_reset_complete(
 	struct isci_port *isci_port,
 	enum sci_status completion_status);
 
-int isci_port_perform_hard_reset(
-	struct isci_port *isci_port_ptr,
-	struct isci_phy *isci_phy_ptr);
+int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
+				 struct isci_phy *iphy);
 
 void isci_port_invalid_link_up(
 		struct scic_sds_controller *scic,
diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index 0fdaa6d62c1b..ab638ec5881c 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -218,33 +218,20 @@ static enum sci_status isci_remote_device_construct(
 	return status;
 }
 
-
-/**
- * isci_remote_device_nuke_requests() - This function terminates all requests
- *    for a given remote device.
- * @isci_device: This parameter specifies the remote device
- *
- */
-void isci_remote_device_nuke_requests(
-	struct isci_remote_device *isci_device)
+void isci_remote_device_nuke_requests(struct isci_host *ihost, struct isci_remote_device *idev)
 {
 	DECLARE_COMPLETION_ONSTACK(aborted_task_completion);
-	struct isci_host *isci_host;
 
-	isci_host = isci_device->isci_port->isci_host;
-
-	dev_dbg(&isci_host->pdev->dev,
-		"%s: isci_device = %p\n", __func__, isci_device);
+	dev_dbg(&ihost->pdev->dev,
+		"%s: idev = %p\n", __func__, idev);
 
 	/* Cleanup all requests pending for this device. */
-	isci_terminate_pending_requests(isci_host, isci_device, terminating);
+	isci_terminate_pending_requests(ihost, idev, terminating);
 
-	dev_dbg(&isci_host->pdev->dev,
-		"%s: isci_device = %p, done\n", __func__, isci_device);
+	dev_dbg(&ihost->pdev->dev,
+		"%s: idev = %p, done\n", __func__, idev);
 }
 
-
-
 /**
  * This function builds the isci_remote_device when a libsas dev_found message
  *    is received.
@@ -380,7 +367,7 @@ enum sci_status isci_remote_device_stop(struct isci_host *ihost, struct isci_rem
 	isci_remote_device_change_state(idev, isci_stopping);
 
 	/* Kill all outstanding requests. */
-	isci_remote_device_nuke_requests(idev);
+	isci_remote_device_nuke_requests(ihost, idev);
 
 	set_bit(IDEV_STOP_PENDING, &idev->flags);
 
@@ -409,7 +396,7 @@ enum sci_status isci_remote_device_stop(struct isci_host *ihost, struct isci_rem
  */
 void isci_remote_device_gone(struct domain_device *dev)
 {
-	struct isci_host *ihost = dev->port->ha->lldd_ha;
+	struct isci_host *ihost = dev_to_ihost(dev);
 	struct isci_remote_device *idev = dev->lldd_dev;
 
 	dev_dbg(&ihost->pdev->dev,
@@ -431,7 +418,7 @@ void isci_remote_device_gone(struct domain_device *dev)
  */
 int isci_remote_device_found(struct domain_device *domain_dev)
 {
-	struct isci_host *isci_host;
+	struct isci_host *isci_host = dev_to_ihost(domain_dev);
 	struct isci_port *isci_port;
 	struct isci_phy *isci_phy;
 	struct asd_sas_port *sas_port;
@@ -439,8 +426,6 @@ int isci_remote_device_found(struct domain_device *domain_dev)
 	struct isci_remote_device *isci_device;
 	enum sci_status status;
 
-	isci_host = isci_host_from_sas_ha(domain_dev->port->ha);
-
 	dev_dbg(&isci_host->pdev->dev,
 		"%s: domain_device = %p\n", __func__, domain_dev);
 
@@ -556,41 +541,22 @@ bool isci_device_is_reset_pending(
  *
  * true if there is a reset pending for the device.
  */
-void isci_device_clear_reset_pending(struct isci_remote_device *isci_device)
+void isci_device_clear_reset_pending(struct isci_host *ihost, struct isci_remote_device *idev)
 {
 	struct isci_request *isci_request;
 	struct isci_request *tmp_req;
-	struct isci_host *isci_host = NULL;
 	unsigned long flags = 0;
 
-	/* FIXME more port gone confusion, and this time it makes the
-	 * locking "fun"
-	 */
-	if (isci_device->isci_port != NULL)
-		isci_host = isci_device->isci_port->isci_host;
-
-	/*
-	 * FIXME when the isci_host gets sorted out
-	 * use dev_dbg()
-	 */
-	pr_debug("%s: isci_device=%p, isci_host=%p\n",
-		 __func__, isci_device, isci_host);
+	dev_dbg(&ihost->pdev->dev, "%s: idev=%p, ihost=%p\n",
+		 __func__, idev, ihost);
 
-	if (isci_host != NULL)
-		spin_lock_irqsave(&isci_host->scic_lock, flags);
-	else
-		pr_err("%s: isci_device %p; isci_host == NULL!\n",
-		       __func__, isci_device);
+	spin_lock_irqsave(&ihost->scic_lock, flags);
 
 	/* Clear reset pending on all pending requests. */
 	list_for_each_entry_safe(isci_request, tmp_req,
-				 &isci_device->reqs_in_process, dev_node) {
-		/*
-		 * FIXME when the conditional spinlock is gone
-		 * change to dev_dbg()
-		 */
-		pr_debug("%s: isci_device = %p request = %p\n",
-			 __func__, isci_device, isci_request);
+				 &idev->reqs_in_process, dev_node) {
+		dev_dbg(&ihost->pdev->dev, "%s: idev = %p request = %p\n",
+			 __func__, idev, isci_request);
 
 		if (isci_request->ttype == io_task) {
 
@@ -603,9 +569,7 @@ void isci_device_clear_reset_pending(struct isci_remote_device *isci_device)
 			spin_unlock_irqrestore(&task->task_state_lock, flags2);
 		}
 	}
-
-	if (isci_host != NULL)
-		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+	spin_unlock_irqrestore(&ihost->scic_lock, flags);
 }
 
 /**
diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h
index cf5302abb8b2..9925316ac55a 100644
--- a/drivers/scsi/isci/remote_device.h
+++ b/drivers/scsi/isci/remote_device.h
@@ -78,59 +78,29 @@ static inline struct scic_sds_remote_device *to_sci_dev(struct isci_remote_devic
 	return (struct scic_sds_remote_device *) &idev[1];
 }
 
-#define to_isci_remote_device(p)	\
-	container_of(p, struct isci_remote_device, sci_remote_device);
-
 #define ISCI_REMOTE_DEVICE_START_TIMEOUT 5000
 
-
-/**
- * isci_dev_from_domain_dev() - This accessor retrieves the remote_device
- *    object reference from the Linux domain_device reference.
- * @domdev,: This parameter points to the Linux domain_device object .
- *
- * A reference to the associated isci remote device.
- */
-#define isci_dev_from_domain_dev(domdev) \
-	((struct isci_remote_device *)(domdev)->lldd_dev)
-
-void isci_remote_device_start_complete(
-	struct isci_host *,
-	struct isci_remote_device *,
-	enum sci_status);
-
-void isci_remote_device_stop_complete(
-	struct isci_host *,
-	struct isci_remote_device *,
-	enum sci_status);
-
+void isci_remote_device_start_complete(struct isci_host *ihost,
+				       struct isci_remote_device *idev,
+				       enum sci_status);
+void isci_remote_device_stop_complete(struct isci_host *ihost,
+				      struct isci_remote_device *idev,
+				      enum sci_status);
 enum sci_status isci_remote_device_stop(struct isci_host *ihost,
 					struct isci_remote_device *idev);
-void isci_remote_device_nuke_requests(
-	struct isci_remote_device *isci_device);
-
+void isci_remote_device_nuke_requests(struct isci_host *ihost,
+				      struct isci_remote_device *idev);
 void isci_remote_device_ready(struct isci_host *ihost,
 			      struct isci_remote_device *idev);
-
 void isci_remote_device_not_ready(struct isci_host *ihost,
 				  struct isci_remote_device *idev, u32 reason);
-
-void isci_remote_device_gone(
-	struct domain_device *domain_dev);
-
-int isci_remote_device_found(
-	struct domain_device *domain_dev);
-
-bool isci_device_is_reset_pending(
-	struct isci_host *isci_host,
-	struct isci_remote_device *isci_device);
-
-void isci_device_clear_reset_pending(
-	struct isci_remote_device *isci_device);
-
-void isci_remote_device_change_state(
-	struct isci_remote_device *isci_device,
-	enum isci_status status);
+void isci_remote_device_gone(struct domain_device *domain_dev);
+int isci_remote_device_found(struct domain_device *domain_dev);
+bool isci_device_is_reset_pending(struct isci_host *ihost,
+				  struct isci_remote_device *idev);
+void isci_device_clear_reset_pending(struct isci_host *ihost,
+				     struct isci_remote_device *idev);
+void isci_remote_device_change_state(struct isci_remote_device *idev,
+				     enum isci_status status);
 
 #endif /* !defined(_ISCI_REMOTE_DEVICE_H_) */
-
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index b519373597a5..37ffedc94ac0 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -379,7 +379,7 @@ int isci_request_execute(
 	struct isci_request *request;
 	unsigned long flags;
 
-	isci_device = isci_dev_from_domain_dev(task->dev);
+	isci_device = task->dev->lldd_dev;
 	sci_device = to_sci_dev(isci_device);
 
 	/* do common allocation and init of request object. */
diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c
index 5bcea60fd8c4..c6c97ad58c9f 100644
--- a/drivers/scsi/isci/task.c
+++ b/drivers/scsi/isci/task.c
@@ -146,7 +146,7 @@ static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task,
  */
 int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
 {
-	struct isci_host *ihost = task->dev->port->ha->lldd_ha;
+	struct isci_host *ihost = dev_to_ihost(task->dev);
 	struct isci_request *request = NULL;
 	struct isci_remote_device *device;
 	unsigned long flags;
@@ -169,7 +169,7 @@ int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
 			"task = %p, num = %d; dev = %p; cmd = %p\n",
 			    task, num, task->dev, task->uldd_task);
 
-		device = isci_dev_from_domain_dev(task->dev);
+		device = task->dev->lldd_dev;
 
 		if (device)
 			device_status = device->status;
@@ -593,7 +593,6 @@ static void isci_task_build_abort_task_tmf(
 
 static struct isci_request *isci_task_get_request_from_task(
 	struct sas_task *task,
-	struct isci_host **isci_host,
 	struct isci_remote_device **isci_device)
 {
 
@@ -609,9 +608,6 @@ static struct isci_request *isci_task_get_request_from_task(
 	    (task->task_state_flags & SAS_TASK_AT_INITIATOR) &&
 	    (request != NULL)) {
 
-		if (isci_host != NULL)
-			*isci_host = request->isci_host;
-
 		if (isci_device != NULL)
 			*isci_device = request->isci_device;
 	}
@@ -1027,26 +1023,17 @@ static int isci_task_send_lu_reset_sas(
  *
  * status, zero indicates success.
  */
-int isci_task_lu_reset(
-	struct domain_device *domain_device,
-	u8 *lun)
+int isci_task_lu_reset(struct domain_device *domain_device, u8 *lun)
 {
-	struct isci_host *isci_host = NULL;
+	struct isci_host *isci_host = dev_to_ihost(domain_device);
 	struct isci_remote_device *isci_device = NULL;
 	int ret;
 	bool device_stopping = false;
 
-	if (domain_device == NULL) {
-		pr_warn("%s: domain_device == NULL\n", __func__);
-		return TMF_RESP_FUNC_FAILED;
-	}
-
-	isci_device = isci_dev_from_domain_dev(domain_device);
-
-	if (domain_device->port != NULL)
-		isci_host = isci_host_from_sas_ha(domain_device->port->ha);
+	isci_device = domain_device->lldd_dev;
 
-	pr_debug("%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
+	dev_dbg(&isci_host->pdev->dev,
+		"%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
 		 __func__, domain_device, isci_host, isci_device);
 
 	if (isci_device != NULL)
@@ -1057,24 +1044,18 @@ int isci_task_lu_reset(
 	 * device's list, fail this LUN reset request in order to
 	 * escalate to the device reset.
 	 */
-	if ((isci_device == NULL) ||
-	    (isci_host == NULL) ||
-	    ((isci_host != NULL) &&
-	     (isci_device != NULL) &&
-	     (device_stopping ||
-	      (isci_device_is_reset_pending(isci_host, isci_device))))) {
+	if (!isci_device || device_stopping ||
+	    isci_device_is_reset_pending(isci_host, isci_device)) {
 		dev_warn(&isci_host->pdev->dev,
-			 "%s: No dev (%p), no host (%p), or "
+			 "%s: No dev (%p), or "
 			 "RESET PENDING: domain_device=%p\n",
-			 __func__, isci_device, isci_host, domain_device);
+			 __func__, isci_device, domain_device);
 		return TMF_RESP_FUNC_FAILED;
 	}
 
 	/* Send the task management part of the reset. */
 	if (sas_protocol_ata(domain_device->tproto)) {
-		ret = isci_task_send_lu_reset_sata(
-			isci_host, isci_device, lun
-			);
+		ret = isci_task_send_lu_reset_sata(isci_host, isci_device, lun);
 	} else
 		ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun);
 
@@ -1173,11 +1154,11 @@ static void isci_abort_task_process_cb(
  */
 int isci_task_abort_task(struct sas_task *task)
 {
+	struct isci_host *isci_host = dev_to_ihost(task->dev);
 	DECLARE_COMPLETION_ONSTACK(aborted_io_completion);
 	struct isci_request       *old_request = NULL;
 	enum isci_request_status  old_state;
 	struct isci_remote_device *isci_device = NULL;
-	struct isci_host          *isci_host = NULL;
 	struct isci_tmf           tmf;
 	int                       ret = TMF_RESP_FUNC_FAILED;
 	unsigned long             flags;
@@ -1189,8 +1170,7 @@ int isci_task_abort_task(struct sas_task *task)
 	 * in the device, because tasks driving resets may land here
 	 * after completion in the core.
 	 */
-	old_request = isci_task_get_request_from_task(task, &isci_host,
-						      &isci_device);
+	old_request = isci_task_get_request_from_task(task, &isci_device);
 
 	dev_dbg(&isci_host->pdev->dev,
 		"%s: task = %p\n", __func__, task);
@@ -1610,37 +1590,29 @@ u32 isci_task_ssp_request_get_response_data_length(
  */
 int isci_bus_reset_handler(struct scsi_cmnd *cmd)
 {
+	struct domain_device *dev = cmd_to_domain_dev(cmd);
+	struct isci_host *isci_host = dev_to_ihost(dev);
 	unsigned long flags = 0;
-	struct isci_host *isci_host = NULL;
 	enum sci_status status;
 	int base_status;
-	struct isci_remote_device *isci_dev
-		= isci_dev_from_domain_dev(
-		sdev_to_domain_dev(cmd->device));
+	struct isci_remote_device *isci_dev = dev->lldd_dev;
 
-	dev_dbg(&cmd->device->sdev_gendev,
+	dev_dbg(&isci_host->pdev->dev,
 		"%s: cmd %p, isci_dev %p\n",
 		__func__, cmd, isci_dev);
 
 	if (!isci_dev) {
-		dev_warn(&cmd->device->sdev_gendev,
+		dev_warn(&isci_host->pdev->dev,
 			 "%s: isci_dev is GONE!\n",
 			 __func__);
 
 		return TMF_RESP_FUNC_COMPLETE; /* Nothing to reset. */
 	}
 
-	if (isci_dev->isci_port != NULL)
-		isci_host = isci_dev->isci_port->isci_host;
-
-	if (isci_host != NULL)
-		spin_lock_irqsave(&isci_host->scic_lock, flags);
-
+	spin_lock_irqsave(&isci_host->scic_lock, flags);
 	status = scic_remote_device_reset(to_sci_dev(isci_dev));
 	if (status != SCI_SUCCESS) {
-
-		if (isci_host != NULL)
-			spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
 
 		scmd_printk(KERN_WARNING, cmd,
 			    "%s: scic_remote_device_reset(%p) returned %d!\n",
@@ -1648,14 +1620,13 @@ int isci_bus_reset_handler(struct scsi_cmnd *cmd)
 
 		return TMF_RESP_FUNC_FAILED;
 	}
-	if (isci_host != NULL)
-		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+	spin_unlock_irqrestore(&isci_host->scic_lock, flags);
 
 	/* Make sure all pending requests are able to be fully terminated. */
-	isci_device_clear_reset_pending(isci_dev);
+	isci_device_clear_reset_pending(isci_host, isci_dev);
 
 	/* Terminate in-progress I/O now. */
-	isci_remote_device_nuke_requests(isci_dev);
+	isci_remote_device_nuke_requests(isci_host, isci_dev);
 
 	/* Call into the libsas default handler (which calls sas_phy_reset). */
 	base_status = sas_eh_bus_reset_handler(cmd);
@@ -1672,13 +1643,9 @@ int isci_bus_reset_handler(struct scsi_cmnd *cmd)
 	}
 
 	/* WHAT TO DO HERE IF sas_phy_reset FAILS? */
-
-	if (isci_host != NULL)
-		spin_lock_irqsave(&isci_host->scic_lock, flags);
+	spin_lock_irqsave(&isci_host->scic_lock, flags);
 	status = scic_remote_device_reset_complete(to_sci_dev(isci_dev));
-
-	if (isci_host != NULL)
-		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+	spin_unlock_irqrestore(&isci_host->scic_lock, flags);
 
 	if (status != SCI_SUCCESS) {
 		scmd_printk(KERN_WARNING, cmd,
@@ -1688,7 +1655,7 @@ int isci_bus_reset_handler(struct scsi_cmnd *cmd)
 	}
 	/* WHAT TO DO HERE IF scic_remote_device_reset_complete FAILS? */
 
-	dev_dbg(&cmd->device->sdev_gendev,
+	dev_dbg(&isci_host->pdev->dev,
 		"%s: cmd %p, isci_dev %p complete.\n",
 		__func__, cmd, isci_dev);