GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-22 23:04:43 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

scsi: don't set tagging state from scsi_adjust_queue_depth

Browse source 
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 <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2014-11-03 20:15:14 +01:00
parent 2ecb204d07
commit c8b09f6fb6
57 changed files with 120 additions and 260 deletions
Download patch file Download diff file Expand all files Collapse all files

18
drivers/target/loopback/tcm_loop.c
View file

@ -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,
};