From c8b09f6fb67df7fc1b51ced1037fa9b677428149 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 3 Nov 2014 20:15:14 +0100 Subject: scsi: don't set tagging state from scsi_adjust_queue_depth Remove the tagged argument from scsi_adjust_queue_depth, and just let it handle the queue depth. For most drivers those two are fairly separate, given that most modern drivers don't care about the SCSI "tagged" status of a command at all, and many old drivers allow queuing of multiple untagged commands in the driver. Instead we start out with the ->simple_tags flag set before calling ->slave_configure, which is how all drivers actually looking at ->simple_tags except for one worke anyway. The one other case looks broken, but I've kept the behavior as-is for now. Except for that we only change ->simple_tags from the ->change_queue_type, and when rejecting a tag message in a single driver, so keeping this churn out of scsi_adjust_queue_depth is a clear win. Now that the usage of scsi_adjust_queue_depth is more obvious we can also remove all the trivial instances in ->slave_alloc or ->slave_configure that just set it to the cmd_per_lun default. Signed-off-by: Christoph Hellwig Reviewed-by: Mike Christie Reviewed-by: Hannes Reinecke Reviewed-by: Martin K. Petersen --- drivers/scsi/esp_scsi.c | 17 ++--------------- 1 file changed, 2 insertions(+), 15 deletions(-) (limited to 'drivers/scsi/esp_scsi.c') diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index 66b6ce10b259..38c23e0b73af 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -2402,27 +2402,14 @@ static int esp_slave_configure(struct scsi_device *dev) { struct esp *esp = shost_priv(dev->host); struct esp_target_data *tp = &esp->target[dev->id]; - int goal_tags, queue_depth; - - goal_tags = 0; if (dev->tagged_supported) { /* XXX make this configurable somehow XXX */ - goal_tags = ESP_DEFAULT_TAGS; + int goal_tags = min(ESP_DEFAULT_TAGS, ESP_MAX_TAG); - if (goal_tags > ESP_MAX_TAG) - goal_tags = ESP_MAX_TAG; + scsi_adjust_queue_depth(dev, goal_tags); } - queue_depth = goal_tags; - if (queue_depth < dev->host->cmd_per_lun) - queue_depth = dev->host->cmd_per_lun; - - if (goal_tags) { - scsi_adjust_queue_depth(dev, MSG_ORDERED_TAG, queue_depth); - } else { - scsi_adjust_queue_depth(dev, 0, queue_depth); - } tp->flags |= ESP_TGT_DISCONNECT; if (!spi_initial_dv(dev->sdev_target)) -- cgit v1.2.3