scsi: always assign block layer tags if enabled
Allow a driver to ask for block layer tags by setting .use_blk_tags in the
host template, in which case it will always see a valid value in
request->tag, similar to the behavior when using blk-mq. This means even
SCSI "untagged" commands will now have a tag, which is especially useful
when using a host-wide tag map.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c
index b23101b..66b6ce1 100644
--- a/drivers/scsi/esp_scsi.c
+++ b/drivers/scsi/esp_scsi.c
@@ -2419,10 +2419,9 @@
queue_depth = dev->host->cmd_per_lun;
if (goal_tags) {
- scsi_set_tag_type(dev, MSG_ORDERED_TAG);
- scsi_activate_tcq(dev, queue_depth);
+ scsi_adjust_queue_depth(dev, MSG_ORDERED_TAG, queue_depth);
} else {
- scsi_deactivate_tcq(dev, queue_depth);
+ scsi_adjust_queue_depth(dev, 0, queue_depth);
}
tp->flags |= ESP_TGT_DISCONNECT;
@@ -2631,6 +2630,7 @@
.use_clustering = ENABLE_CLUSTERING,
.max_sectors = 0xffff,
.skip_settle_delay = 1,
+ .use_blk_tags = 1,
};
EXPORT_SYMBOL(scsi_esp_template);