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/target/loopback/tcm_loop.c | 18 ++---------------- 1 file changed, 2 insertions(+), 16 deletions(-) (limited to 'drivers/target/loopback') diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c index 120a851df0d7..0ed96644ec94 100644 --- a/drivers/target/loopback/tcm_loop.c +++ b/drivers/target/loopback/tcm_loop.c @@ -121,13 +121,13 @@ static int tcm_loop_change_queue_depth( { switch (reason) { case SCSI_QDEPTH_DEFAULT: - scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); + scsi_adjust_queue_depth(sdev, depth); break; case SCSI_QDEPTH_QFULL: scsi_track_queue_full(sdev, depth); break; case SCSI_QDEPTH_RAMP_UP: - scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); + scsi_adjust_queue_depth(sdev, depth); break; default: return -EOPNOTSUPP; @@ -404,19 +404,6 @@ static int tcm_loop_slave_alloc(struct scsi_device *sd) return 0; } -static int tcm_loop_slave_configure(struct scsi_device *sd) -{ - if (sd->tagged_supported) { - scsi_adjust_queue_depth(sd, MSG_SIMPLE_TAG, - sd->host->cmd_per_lun); - } else { - scsi_adjust_queue_depth(sd, 0, - sd->host->cmd_per_lun); - } - - return 0; -} - static struct scsi_host_template tcm_loop_driver_template = { .show_info = tcm_loop_show_info, .proc_name = "tcm_loopback", @@ -434,7 +421,6 @@ static struct scsi_host_template tcm_loop_driver_template = { .max_sectors = 0xFFFF, .use_clustering = DISABLE_CLUSTERING, .slave_alloc = tcm_loop_slave_alloc, - .slave_configure = tcm_loop_slave_configure, .module = THIS_MODULE, .use_blk_tags = 1, }; -- cgit v1.2.3