[PATCH v7 21/22] scsi: ufs: Have scsi-ml retry start stop errors

[Mike Christie <michael.christie@oracle.com>]

This has scsi-ml retry errors instead of driving them itself.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
 drivers/ufs/core/ufshcd.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 064a6d8605c1..9f37c3993d1c 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -9126,6 +9126,12 @@ static int ufshcd_execute_start_stop(struct scsi_device *sdev,
 	struct request *req;
 	struct scsi_cmnd *scmd;
 	int ret;
+	struct scsi_failure failures[] = {
+		{
+			.allowed = 2,
+			.result = SCMD_FAILURE_RESULT_ANY,
+		},
+	};
 
 	req = scsi_alloc_request(sdev->request_queue, REQ_OP_DRV_IN,
 				 BLK_MQ_REQ_PM);
@@ -9137,6 +9143,7 @@ static int ufshcd_execute_start_stop(struct scsi_device *sdev,
 	memcpy(scmd->cmnd, cdb, scmd->cmd_len);
 	scmd->allowed = 0/*retries*/;
 	scmd->flags |= SCMD_FAIL_IF_RECOVERING;
+	scmd->failures = failures;
 	req->timeout = 1 * HZ;
 	req->rq_flags |= RQF_PM | RQF_QUIET;
 
@@ -9167,7 +9174,7 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba,
 	struct scsi_sense_hdr sshdr;
 	struct scsi_device *sdp;
 	unsigned long flags;
-	int ret, retries;
+	int ret;
 
 	spin_lock_irqsave(hba->host->host_lock, flags);
 	sdp = hba->ufs_device_wlun;
@@ -9193,15 +9200,7 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba,
 	 * callbacks hence set the RQF_PM flag so that it doesn't resume the
 	 * already suspended childs.
 	 */
-	for (retries = 3; retries > 0; --retries) {
-		ret = ufshcd_execute_start_stop(sdp, pwr_mode, &sshdr);
-		/*
-		 * scsi_execute() only returns a negative value if the request
-		 * queue is dying.
-		 */
-		if (ret <= 0)
-			break;
-	}
+	ret = ufshcd_execute_start_stop(sdp, pwr_mode, &sshdr);
 	if (ret) {
 		sdev_printk(KERN_WARNING, sdp,
 			    "START_STOP failed for power mode: %d, result %x\n",
-- 
2.25.1