[SCSI] isci: Remove redundant isci_request.ttype field.

Use the existing IREQ_TMF flag as a request type indicator.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

4 files changed, 31 insertions, 60 deletions

diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index 20c77edd4711..9d9e33d2ed51 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -1463,15 +1463,12 @@ void isci_device_clear_reset_pending(struct isci_host *ihost, struct isci_remote
                 dev_dbg(&ihost->pdev->dev, "%s: idev = %p request = %p\n",
                          __func__, idev, isci_request);
 
-                if (isci_request->ttype == io_task) {
+                if (!test_bit(IREQ_TMF, &isci_request->flags)) {
+                        struct sas_task *task = isci_request_access_task(isci_request);
 
-                        unsigned long flags2;
-                        struct sas_task *task = isci_request_access_task(
-                                isci_request);
-
-                        spin_lock_irqsave(&task->task_state_lock, flags2);
+                        spin_lock(&task->task_state_lock);
                         task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET;
-                        spin_unlock_irqrestore(&task->task_state_lock, flags2);
+                        spin_unlock(&task->task_state_lock);
                 }
         }
         spin_unlock_irqrestore(&ihost->scic_lock, flags);
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index bfc7379727b1..192cb48d849a 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -191,7 +191,7 @@ static void sci_task_request_build_ssp_task_iu(struct isci_request *ireq)
 
         task_iu->task_func = isci_tmf->tmf_code;
         task_iu->task_tag =
-                (ireq->ttype == tmf_task) ?
+                (test_bit(IREQ_TMF, &ireq->flags)) ?
                 isci_tmf->io_tag :
                 SCI_CONTROLLER_INVALID_IO_TAG;
 }
@@ -516,7 +516,7 @@ sci_io_request_construct_sata(struct isci_request *ireq,
         struct domain_device *dev = ireq->target_device->domain_dev;
 
         /* check for management protocols */
-        if (ireq->ttype == tmf_task) {
+        if (test_bit(IREQ_TMF, &ireq->flags)) {
                 struct isci_tmf *tmf = isci_request_access_tmf(ireq);
 
                 if (tmf->tmf_code == isci_tmf_sata_srst_high ||
@@ -632,7 +632,7 @@ enum sci_status sci_task_request_construct_sata(struct isci_request *ireq)
         enum sci_status status = SCI_SUCCESS;
 
         /* check for management protocols */
-        if (ireq->ttype == tmf_task) {
+        if (test_bit(IREQ_TMF, &ireq->flags)) {
                 struct isci_tmf *tmf = isci_request_access_tmf(ireq);
 
                 if (tmf->tmf_code == isci_tmf_sata_srst_high ||
@@ -2630,14 +2630,8 @@ static void isci_task_save_for_upper_layer_completion(
         switch (task_notification_selection) {
 
         case isci_perform_normal_io_completion:
-
                 /* Normal notification (task_done) */
-                dev_dbg(&host->pdev->dev,
-                        "%s: Normal - task = %p, response=%d (%d), status=%d (%d)\n",
-                        __func__,
-                        task,
-                        task->task_status.resp, response,
-                        task->task_status.stat, status);
+
                 /* Add to the completed list. */
                 list_add(&request->completed_node,
                          &host->requests_to_complete);
@@ -2650,13 +2644,6 @@ static void isci_task_save_for_upper_layer_completion(
                 /* No notification to libsas because this request is
                  * already in the abort path.
                  */
-                dev_dbg(&host->pdev->dev,
-                         "%s: Aborted - task = %p, response=%d (%d), status=%d (%d)\n",
-                         __func__,
-                         task,
-                         task->task_status.resp, response,
-                         task->task_status.stat, status);
-
                 /* Wake up whatever process was waiting for this
                  * request to complete.
                  */
@@ -2673,30 +2660,22 @@ static void isci_task_save_for_upper_layer_completion(
 
         case isci_perform_error_io_completion:
                 /* Use sas_task_abort */
-                dev_dbg(&host->pdev->dev,
-                         "%s: Error - task = %p, response=%d (%d), status=%d (%d)\n",
-                         __func__,
-                         task,
-                         task->task_status.resp, response,
-                         task->task_status.stat, status);
                 /* Add to the aborted list. */
                 list_add(&request->completed_node,
                          &host->requests_to_errorback);
                 break;
 
         default:
-                dev_dbg(&host->pdev->dev,
-                         "%s: Unknown - task = %p, response=%d (%d), status=%d (%d)\n",
-                         __func__,
-                         task,
-                         task->task_status.resp, response,
-                         task->task_status.stat, status);
-
                 /* Add to the error to libsas list. */
                 list_add(&request->completed_node,
                          &host->requests_to_errorback);
                 break;
         }
+        dev_dbg(&host->pdev->dev,
+                "%s: %d - task = %p, response=%d (%d), status=%d (%d)\n",
+                __func__, task_notification_selection, task,
+                (task) ? task->task_status.resp : 0, response,
+                (task) ? task->task_status.stat : 0, status);
 }
 
 static void isci_process_stp_response(struct sas_task *task, struct dev_to_host_fis *fis)
@@ -3079,7 +3058,7 @@ static void sci_request_started_state_enter(struct sci_base_state_machine *sm)
         /* XXX as hch said always creating an internal sas_task for tmf
          * requests would simplify the driver
          */
-        task = ireq->ttype == io_task ? isci_request_access_task(ireq) : NULL;
+        task = (test_bit(IREQ_TMF, &ireq->flags)) ? NULL : isci_request_access_task(ireq);
 
         /* all unaccelerated request types (non ssp or ncq) handled with
          * substates
@@ -3563,7 +3542,7 @@ static struct isci_request *isci_io_request_from_tag(struct isci_host *ihost,
 
         ireq = isci_request_from_tag(ihost, tag);
         ireq->ttype_ptr.io_task_ptr = task;
-        ireq->ttype = io_task;
+        clear_bit(IREQ_TMF, &ireq->flags);
         task->lldd_task = ireq;
 
         return ireq;
@@ -3577,7 +3556,7 @@ struct isci_request *isci_tmf_request_from_tag(struct isci_host *ihost,
 
         ireq = isci_request_from_tag(ihost, tag);
         ireq->ttype_ptr.tmf_task_ptr = isci_tmf;
-        ireq->ttype = tmf_task;
+        set_bit(IREQ_TMF, &ireq->flags);
 
         return ireq;
 }
diff --git a/drivers/scsi/isci/request.h b/drivers/scsi/isci/request.h
index f720b97b7bb5..be38933dd6df 100644
--- a/drivers/scsi/isci/request.h
+++ b/drivers/scsi/isci/request.h
@@ -77,11 +77,6 @@ enum isci_request_status {
         dead        = 0x07
 };
 
-enum task_type {
-        io_task  = 0,
-        tmf_task = 1
-};
-
 enum sci_request_protocol {
         SCIC_NO_PROTOCOL,
         SCIC_SMP_PROTOCOL,
@@ -116,7 +111,6 @@ struct isci_request {
         #define IREQ_ACTIVE 3
         unsigned long flags;
         /* XXX kill ttype and ttype_ptr, allocate full sas_task */
-        enum task_type ttype;
         union ttype_ptr_union {
                 struct sas_task *io_task_ptr;   /* When ttype==io_task  */
                 struct isci_tmf *tmf_task_ptr;  /* When ttype==tmf_task */
diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c
index ec85beb1f979..80e1a69ac96f 100644
--- a/drivers/scsi/isci/task.c
+++ b/drivers/scsi/isci/task.c
@@ -254,7 +254,7 @@ static enum sci_status isci_sata_management_task_request_build(struct isci_reque
         struct isci_tmf *isci_tmf;
         enum sci_status status;
 
-        if (tmf_task != ireq->ttype)
+        if (!test_bit(IREQ_TMF, &ireq->flags))
                 return SCI_FAILURE;
 
         isci_tmf = isci_request_access_tmf(ireq);
@@ -352,18 +352,7 @@ static void isci_request_mark_zombie(struct isci_host *ihost, struct isci_reques
         req_completion = ireq->io_request_completion;
         ireq->io_request_completion = NULL;
 
-        if (ireq->ttype == io_task) {
-
-                /* Break links with the sas_task - the callback is done
-                 * elsewhere.
-                 */
-                struct sas_task *task = isci_request_access_task(ireq);
-
-                if (task)
-                        task->lldd_task = NULL;
-
-                ireq->ttype_ptr.io_task_ptr = NULL;
-        } else {
+        if (test_bit(IREQ_TMF, &ireq->flags)) {
                 /* Break links with the TMF request. */
                 struct isci_tmf *tmf = isci_request_access_tmf(ireq);
 
@@ -380,6 +369,16 @@ static void isci_request_mark_zombie(struct isci_host *ihost, struct isci_reques
                 ireq->ttype_ptr.tmf_task_ptr = NULL;
                 dev_dbg(&ihost->pdev->dev, "%s: tmf_code %d, managed tag %#x\n",
                         __func__, tmf->tmf_code, tmf->io_tag);
+        } else {
+                /* Break links with the sas_task - the callback is done
+                 * elsewhere.
+                 */
+                struct sas_task *task = isci_request_access_task(ireq);
+
+                if (task)
+                        task->lldd_task = NULL;
+
+                ireq->ttype_ptr.io_task_ptr = NULL;
         }
 
         dev_warn(&ihost->pdev->dev, "task context unrecoverable (tag: %#x)\n",
@@ -803,7 +802,9 @@ void isci_terminate_pending_requests(struct isci_host *ihost,
                 dev_dbg(&ihost->pdev->dev,
                          "%s: idev=%p request=%p; task=%p old_state=%d\n",
                          __func__, idev, ireq,
-                        ireq->ttype == io_task ? isci_request_access_task(ireq) : NULL,
+                        (!test_bit(IREQ_TMF, &ireq->flags)
+                                ? isci_request_access_task(ireq)
+                                : NULL),
                         old_state);
 
                 /* If the old_state is started: