block: rename BLK_EH_NOT_HANDLED to BLK_EH_DONE

The BLK_EH_NOT_HANDLED implies nothing happen, but very often that
is not what is happening - instead the driver already completed the
command.  Fix the symbolic name to reflect that a little better.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

Documentation/scsi/scsi_eh.txt

@@ -97,9 +97,9 @@ function
 	This indicates that more time is required to finish the
 	command.  Timer is restarted.  This action is counted as a
 	retry and only allowed scmd->allowed + 1(!) times.  Once the
-	limit is reached, action for BLK_EH_NOT_HANDLED is taken instead.
+	limit is reached, action for BLK_EH_DONE is taken instead.
 
-    - BLK_EH_NOT_HANDLED
+    - BLK_EH_DONE
         eh_timed_out() callback did not handle the command.
 	Step #2 is taken.
 

block/blk-mq.c

@@ -784,7 +784,7 @@ static void blk_mq_rq_timed_out(struct request *req, bool reserved)
 	case BLK_EH_RESET_TIMER:
 		blk_add_timer(req);
 		break;
-	case BLK_EH_NOT_HANDLED:
+	case BLK_EH_DONE:
 		break;
 	default:
 		printk(KERN_ERR "block: bad eh return: %d\n", ret);

block/blk-timeout.c

@@ -93,7 +93,7 @@ static void blk_rq_timed_out(struct request *req)
 		blk_add_timer(req);
 		blk_clear_rq_complete(req);
 		break;
-	case BLK_EH_NOT_HANDLED:
+	case BLK_EH_DONE:
 		/*
 		 * LLD handles this for now but in the future
 		 * we can send a request msg to abort the command

drivers/block/nbd.c

@@ -332,7 +332,7 @@ static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req,
 			}
 			blk_mq_requeue_request(req, true);
 			nbd_config_put(nbd);
-			return BLK_EH_NOT_HANDLED;
+			return BLK_EH_DONE;
 		}
 	} else {
 		dev_err_ratelimited(nbd_to_dev(nbd),

drivers/message/fusion/mptsas.c

@@ -1929,7 +1929,7 @@ static enum blk_eh_timer_return mptsas_eh_timed_out(struct scsi_cmnd *sc)
 	MPT_SCSI_HOST *hd;
 	MPT_ADAPTER   *ioc;
 	VirtDevice    *vdevice;
-	enum blk_eh_timer_return rc = BLK_EH_NOT_HANDLED;
+	enum blk_eh_timer_return rc = BLK_EH_DONE;
 
 	hd = shost_priv(sc->device->host);
 	if (hd == NULL) {

drivers/s390/block/dasd.c

@@ -3053,7 +3053,7 @@ static blk_status_t do_dasd_request(struct blk_mq_hw_ctx *hctx,
  *
  * Return values:
  * BLK_EH_RESET_TIMER if the request should be left running
- * BLK_EH_NOT_HANDLED if the request is handled or terminated
+ * BLK_EH_DONE if the request is handled or terminated
  *		      by the driver.
  */
 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved)
@@ -3065,7 +3065,7 @@ enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved)
 	int rc = 0;
 
 	if (!cqr)
-		return BLK_EH_NOT_HANDLED;
+		return BLK_EH_DONE;
 
 	spin_lock_irqsave(&cqr->dq->lock, flags);
 	device = cqr->startdev ? cqr->startdev : block->base;
@@ -3124,7 +3124,7 @@ enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved)
 	spin_unlock(&block->queue_lock);
 	spin_unlock_irqrestore(&cqr->dq->lock, flags);
 
-	return rc ? BLK_EH_RESET_TIMER : BLK_EH_NOT_HANDLED;
+	return rc ? BLK_EH_RESET_TIMER : BLK_EH_DONE;
 }
 
 static int dasd_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,

drivers/scsi/gdth.c

@@ -3882,7 +3882,7 @@ static enum blk_eh_timer_return gdth_timed_out(struct scsi_cmnd *scp)
 	struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
 	u8 b, t;
 	unsigned long flags;
-	enum blk_eh_timer_return retval = BLK_EH_NOT_HANDLED;
+	enum blk_eh_timer_return retval = BLK_EH_DONE;
 
 	TRACE(("%s() cmd 0x%x\n", scp->cmnd[0], __func__));
 	b = scp->device->channel;

drivers/scsi/libiscsi.c

@@ -1963,7 +1963,7 @@ static int iscsi_has_ping_timed_out(struct iscsi_conn *conn)
 
 enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc)
 {
-	enum blk_eh_timer_return rc = BLK_EH_NOT_HANDLED;
+	enum blk_eh_timer_return rc = BLK_EH_DONE;
 	struct iscsi_task *task = NULL, *running_task;
 	struct iscsi_cls_session *cls_session;
 	struct iscsi_session *session;

drivers/scsi/megaraid/megaraid_sas_base.c

@@ -2772,7 +2772,7 @@ blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
 
 	if (time_after(jiffies, scmd->jiffies_at_alloc +
 				(scmd_timeout * 2) * HZ)) {
-		return BLK_EH_NOT_HANDLED;
+		return BLK_EH_DONE;
 	}
 
 	instance = (struct megasas_instance *)scmd->device->host->hostdata;

drivers/scsi/mvumi.c

@@ -2155,7 +2155,7 @@ static enum blk_eh_timer_return mvumi_timed_out(struct scsi_cmnd *scmd)
 	mvumi_return_cmd(mhba, cmd);
 	spin_unlock_irqrestore(mhba->shost->host_lock, flags);
 
-	return BLK_EH_NOT_HANDLED;
+	return BLK_EH_DONE;
 }
 
 static int

drivers/scsi/qla4xxx/ql4_os.c

@@ -1848,7 +1848,7 @@ static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
 	struct iscsi_cls_session *session;
 	struct iscsi_session *sess;
 	unsigned long flags;
-	enum blk_eh_timer_return ret = BLK_EH_NOT_HANDLED;
+	enum blk_eh_timer_return ret = BLK_EH_DONE;
 
 	session = starget_to_session(scsi_target(sc->device));
 	sess = session->dd_data;

drivers/scsi/scsi_error.c

@@ -282,7 +282,7 @@ void scsi_eh_scmd_add(struct scsi_cmnd *scmd)
 enum blk_eh_timer_return scsi_times_out(struct request *req)
 {
 	struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
-	enum blk_eh_timer_return rtn = BLK_EH_NOT_HANDLED;
+	enum blk_eh_timer_return rtn = BLK_EH_DONE;
 	struct Scsi_Host *host = scmd->device->host;
 
 	trace_scsi_dispatch_cmd_timeout(scmd);
@@ -294,7 +294,7 @@ enum blk_eh_timer_return scsi_times_out(struct request *req)
 	if (host->hostt->eh_timed_out)
 		rtn = host->hostt->eh_timed_out(scmd);
 
-	if (rtn == BLK_EH_NOT_HANDLED) {
+	if (rtn == BLK_EH_DONE) {
 		if (scsi_abort_command(scmd) != SUCCESS) {
 			set_host_byte(scmd, DID_TIME_OUT);
 			scsi_eh_scmd_add(scmd);

drivers/scsi/scsi_transport_fc.c

@@ -2087,7 +2087,7 @@ fc_eh_timed_out(struct scsi_cmnd *scmd)
 	if (rport->port_state == FC_PORTSTATE_BLOCKED)
 		return BLK_EH_RESET_TIMER;
 
-	return BLK_EH_NOT_HANDLED;
+	return BLK_EH_DONE;
 }
 EXPORT_SYMBOL(fc_eh_timed_out);
 
@@ -3592,7 +3592,7 @@ fc_bsg_job_timeout(struct request *req)
 
 	/* the blk_end_sync_io() doesn't check the error */
 	if (!inflight)
-		return BLK_EH_NOT_HANDLED;
+		return BLK_EH_DONE;
 	else
 		return BLK_EH_HANDLED;
 }

drivers/scsi/scsi_transport_srp.c

@@ -587,7 +587,7 @@ EXPORT_SYMBOL(srp_reconnect_rport);
  *
  * If a timeout occurs while an rport is in the blocked state, ask the SCSI
  * EH to continue waiting (BLK_EH_RESET_TIMER). Otherwise let the SCSI core
- * handle the timeout (BLK_EH_NOT_HANDLED).
+ * handle the timeout (BLK_EH_DONE).
  *
  * Note: This function is called from soft-IRQ context and with the request
  * queue lock held.
@@ -602,7 +602,7 @@ enum blk_eh_timer_return srp_timed_out(struct scsi_cmnd *scmd)
 	pr_debug("timeout for sdev %s\n", dev_name(&sdev->sdev_gendev));
 	return rport->fast_io_fail_tmo < 0 && rport->dev_loss_tmo < 0 &&
 		i->f->reset_timer_if_blocked && scsi_device_blocked(sdev) ?
-		BLK_EH_RESET_TIMER : BLK_EH_NOT_HANDLED;
+		BLK_EH_RESET_TIMER : BLK_EH_DONE;
 }
 EXPORT_SYMBOL(srp_timed_out);
 

drivers/scsi/ufs/ufshcd.c

@@ -6497,12 +6497,12 @@ static enum blk_eh_timer_return ufshcd_eh_timed_out(struct scsi_cmnd *scmd)
 	bool found = false;
 
 	if (!scmd || !scmd->device || !scmd->device->host)
-		return BLK_EH_NOT_HANDLED;
+		return BLK_EH_DONE;
 
 	host = scmd->device->host;
 	hba = shost_priv(host);
 	if (!hba)
-		return BLK_EH_NOT_HANDLED;
+		return BLK_EH_DONE;
 
 	spin_lock_irqsave(host->host_lock, flags);
 
@@ -6520,7 +6520,7 @@ static enum blk_eh_timer_return ufshcd_eh_timed_out(struct scsi_cmnd *scmd)
 	 * SCSI command was not actually dispatched to UFS driver, otherwise
 	 * let SCSI layer handle the error as usual.
 	 */
-	return found ? BLK_EH_NOT_HANDLED : BLK_EH_RESET_TIMER;
+	return found ? BLK_EH_DONE : BLK_EH_RESET_TIMER;
 }
 
 static const struct attribute_group *ufshcd_driver_groups[] = {

include/linux/blkdev.h

@@ -326,7 +326,7 @@ typedef int (init_rq_fn)(struct request_queue *, struct request *, gfp_t);
 typedef void (exit_rq_fn)(struct request_queue *, struct request *);
 
 enum blk_eh_timer_return {
-	BLK_EH_NOT_HANDLED,
+	BLK_EH_DONE,
 	BLK_EH_HANDLED,
 	BLK_EH_RESET_TIMER,
 };

include/scsi/scsi_host.h

@@ -307,7 +307,7 @@ struct scsi_host_template {
 	 * EH_HANDLED:		I fixed the error, please complete the command
 	 * EH_RESET_TIMER:	I need more time, reset the timer and
 	 *			begin counting again
-	 * EH_NOT_HANDLED	Begin normal error recovery
+	 * EH_DONE:		Begin normal error recovery
 	 *
 	 * Status: OPTIONAL
 	 */