[PATCH 3/6] hisi_sas: use slot abort in v1 hw

[John Garry]

When TRANS_TX_CREDIT_TIMEOUT_ERR or
TRANS_TX_CLOSE_NORMAL_ERR errors occur for a
command, the command should be re-attempted.

Signed-off-by: John Garry <john.ga...@huawei.com>
---
 drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c 
b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
index ce5f65d..34f71a1c 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
@@ -1118,9 +1118,8 @@ static int prep_ssp_v1_hw(struct hisi_hba *hisi_hba,
 }
 
 /* by default, task resp is complete */
-static void slot_err_v1_hw(struct hisi_hba *hisi_hba,
-                          struct sas_task *task,
-                          struct hisi_sas_slot *slot)
+static void slot_err_v1_hw(struct hisi_hba *hisi_hba, struct sas_task *task,
+                          struct hisi_sas_slot *slot, int *abort_slot)
 {
        struct task_status_struct *ts = &task->task_status;
        struct hisi_sas_err_record_v1 *err_record = slot->status_buffer;
@@ -1212,6 +1211,14 @@ static void slot_err_v1_hw(struct hisi_hba *hisi_hba,
                        ts->stat = SAS_NAK_R_ERR;
                        break;
                }
+               case TRANS_TX_CREDIT_TIMEOUT_ERR:
+               case TRANS_TX_CLOSE_NORMAL_ERR:
+               {
+                       /* This will request a retry */
+                       ts->stat = SAS_QUEUE_FULL;
+                       ++(*abort_slot);
+                       break;
+               }
                default:
                {
                        ts->stat = SAM_STAT_CHECK_CONDITION;
@@ -1317,8 +1324,14 @@ static int slot_complete_v1_hw(struct hisi_hba *hisi_hba,
 
        if (cmplt_hdr_data & CMPLT_HDR_ERR_RCRD_XFRD_MSK &&
                !(cmplt_hdr_data & CMPLT_HDR_RSPNS_XFRD_MSK)) {
+               int abort_slot = 0;
 
-               slot_err_v1_hw(hisi_hba, task, slot);
+               slot_err_v1_hw(hisi_hba, task, slot,  &abort_slot);
+               if (unlikely(abort_slot)) {
+                       queue_work(hisi_hba->wq, &slot->abort_slot);
+                       sts = ts->stat;
+                       goto out_1;
+               }
                goto out;
        }
 
@@ -1375,6 +1388,7 @@ out:
 
        if (task->task_done)
                task->task_done(task);
+out_1:
 
        return sts;
 }
-- 
1.9.1