[PATCH v2 3/6] hisi_sas: use slot abort in v1 hw

[John Garry]

When TRANS_TX_CREDIT_TIMEOUT_ERR or
TRANS_TX_CLOSE_NORMAL_ERR error occur in
a slot, the command should be re-attempted.
This error is equivalent to meaning that the queue
is full in the sdev (and not the host).

Signed-off-by: John Garry <john.ga...@huawei.com>
---
 drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c 
b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
index ce5f65d..1abbc2e 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
@@ -1212,6 +1212,14 @@ 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;
+                       slot->abort = 1;
+                       break;
+               }
                default:
                {
                        ts->stat = SAM_STAT_CHECK_CONDITION;
@@ -1319,6 +1327,11 @@ static int slot_complete_v1_hw(struct hisi_hba *hisi_hba,
                !(cmplt_hdr_data & CMPLT_HDR_RSPNS_XFRD_MSK)) {
 
                slot_err_v1_hw(hisi_hba, task, slot);
+               if (unlikely(slot->abort)) {
+                       queue_work(hisi_hba->wq, &slot->abort_slot);
+                       /* immediately return and do not complete */
+                       return ts->stat;
+               }
                goto out;
        }
 
-- 
1.9.1