ata: libata-scsi: improve readability of ata_scsi_qc_issue()

Improve readability of ata_scsi_qc_issue().

No functional changes.

Tested-by: Tommy Kelly <linux@tkel.ly>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>

Author: floatious

drivers/ata/libata-scsi.c

@@ -1767,7 +1767,7 @@ static int ata_scsi_qc_issue(struct ata_port *ap, struct ata_queued_cmd *qc)
 	int ret;
 
 	if (!ap->ops->qc_defer)
-		goto issue;
+		goto issue_qc;
 
 	/*
 	 * If we already have a deferred qc, then rely on the SCSI layer to
@@ -1786,38 +1786,37 @@ static int ata_scsi_qc_issue(struct ata_port *ap, struct ata_queued_cmd *qc)
 		break;
 	case ATA_DEFER_LINK:
 		ret = SCSI_MLQUEUE_DEVICE_BUSY;
-		break;
+		goto defer_qc;
 	case ATA_DEFER_PORT:
 		ret = SCSI_MLQUEUE_HOST_BUSY;
-		break;
+		goto defer_qc;
 	default:
 		WARN_ON_ONCE(1);
 		ret = SCSI_MLQUEUE_HOST_BUSY;
-		break;
+		goto defer_qc;
 	}
 
-	if (ret) {
-		/*
-		 * We must defer this qc: if this is not an NCQ command, keep
-		 * this qc as a deferred one and report to the SCSI layer that
-		 * we issued it so that it is not requeued. The deferred qc will
-		 * be issued with the port deferred_qc_work once all on-going
-		 * commands complete.
-		 */
-		if (!ata_is_ncq(qc->tf.protocol)) {
-			ap->deferred_qc = qc;
-			return 0;
-		}
+issue_qc:
+	ata_qc_issue(qc);
+	return 0;
 
-		/* Force a requeue of the command to defer its execution. */
-		ata_qc_free(qc);
-		return ret;
+defer_qc:
+	/*
+	 * We must defer this qc: if this is not an NCQ command, keep
+	 * this qc as a deferred one and report to the SCSI layer that
+	 * we issued it so that it is not requeued. The deferred qc will
+	 * be issued with the port deferred_qc_work once all on-going
+	 * commands complete.
+	 */
+	if (!ata_is_ncq(qc->tf.protocol)) {
+		ap->deferred_qc = qc;
+		return 0;
 	}
 
-issue:
-	ata_qc_issue(qc);
+	/* Force a requeue of the command to defer its execution. */
+	ata_qc_free(qc);
 
-	return 0;
+	return ret;
 }
 
 /**