scsi: ufs: Have midlayer retry start stop errors

This has the SCSI midlayer retry errors instead of driving them itself.

Signed-off-by: Mike Christie <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Christoph Hellwig <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: mikechristie

drivers/ufs/core/ufshcd.c

@@ -9475,7 +9475,17 @@ static int ufshcd_execute_start_stop(struct scsi_device *sdev,
 				     struct scsi_sense_hdr *sshdr)
 {
 	const unsigned char cdb[6] = { START_STOP, 0, 0, 0, pwr_mode << 4, 0 };
+	struct scsi_failure failure_defs[] = {
+		{
+			.allowed = 2,
+			.result = SCMD_FAILURE_RESULT_ANY,
+		},
+	};
+	struct scsi_failures failures = {
+		.failure_definitions = failure_defs,
+	};
 	const struct scsi_exec_args args = {
+		.failures = &failures,
 		.sshdr = sshdr,
 		.req_flags = BLK_MQ_REQ_PM,
 		.scmd_flags = SCMD_FAIL_IF_RECOVERING,
@@ -9501,7 +9511,7 @@ 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;
@@ -9527,15 +9537,7 @@ 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",