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block: remove spurious uses of REQ_HARDBARRIER 

REQ_HARDBARRIER is deprecated.  Remove spurious uses in the following
users.  Please note that other than osdblk, all other uses were
already spurious before deprecation.

* osdblk: osdblk_rq_fn() won't receive any request with
  REQ_HARDBARRIER set.  Remove the test for it.

* pktcdvd: use of REQ_HARDBARRIER in pkt_generic_packet() doesn't mean
  anything.  Removed.

* aic7xxx_old: Setting MSG_ORDERED_Q_TAG on REQ_HARDBARRIER is
  spurious.  Removed.

* sas_scsi_host: Setting TASK_ATTR_ORDERED on REQ_HARDBARRIER is
  spurious.  Removed.

* scsi_tcq: The ordered tag path wasn't being used anyway.  Removed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Boaz Harrosh <bharrosh@panasas.com>
Cc: James Bottomley <James.Bottomley@suse.de>
Cc: Peter Osterlund <petero2@telia.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Tejun Heo 2010-09-03 11:56:16 +02:00 committed by Jens Axboe
parent 4913efe456
commit 9cbbdca44a
5 changed files with 5 additions and 39 deletions
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3
drivers/block/osdblk.c
View File

@ -310,8 +310,7 @@ static void osdblk_rq_fn(struct request_queue *q)
break;
/* filter out block requests we don't understand */
if (rq->cmd_type != REQ_TYPE_FS &&
!(rq->cmd_flags & REQ_HARDBARRIER)) {
if (rq->cmd_type != REQ_TYPE_FS) {
blk_end_request_all(rq, 0);
continue;
}

1
drivers/block/pktcdvd.c
View File

@ -753,7 +753,6 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
rq->timeout = 60*HZ;
rq->cmd_type = REQ_TYPE_BLOCK_PC;
rq->cmd_flags |= REQ_HARDBARRIER;
if (cgc->quiet)
rq->cmd_flags |= REQ_QUIET;

21
drivers/scsi/aic7xxx_old.c
View File

@ -2850,12 +2850,6 @@ aic7xxx_done(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
aic_dev->r_total++;
ptr = aic_dev->r_bins;
}
if(cmd->device->simple_tags && cmd->request->cmd_flags & REQ_HARDBARRIER)
{
aic_dev->barrier_total++;
if(scb->tag_action == MSG_ORDERED_Q_TAG)
aic_dev->ordered_total++;
}
x = scb->sg_length;
x >>= 10;
for(i=0; i<6; i++)
@ -10144,19 +10138,8 @@ static void aic7xxx_buildscb(struct aic7xxx_host *p, struct scsi_cmnd *cmd,
/* We always force TEST_UNIT_READY to untagged */
if (cmd->cmnd[0] != TEST_UNIT_READY && sdptr->simple_tags)
{
if (req->cmd_flags & REQ_HARDBARRIER)
{
if(sdptr->ordered_tags)
{
hscb->control |= MSG_ORDERED_Q_TAG;
scb->tag_action = MSG_ORDERED_Q_TAG;
}
}
else
{
hscb->control |= MSG_SIMPLE_Q_TAG;
scb->tag_action = MSG_SIMPLE_Q_TAG;
}
hscb->control |= MSG_SIMPLE_Q_TAG;
scb->tag_action = MSG_SIMPLE_Q_TAG;
}
}
if ( !(aic_dev->dtr_pending) &&

13
drivers/scsi/libsas/sas_scsi_host.c
View File

@ -130,17 +130,6 @@ static void sas_scsi_task_done(struct sas_task *task)
sc->scsi_done(sc);
}
static enum task_attribute sas_scsi_get_task_attr(struct scsi_cmnd *cmd)
{
enum task_attribute ta = TASK_ATTR_SIMPLE;
if (cmd->request && blk_rq_tagged(cmd->request)) {
if (cmd->device->ordered_tags &&
(cmd->request->cmd_flags & REQ_HARDBARRIER))
ta = TASK_ATTR_ORDERED;
}
return ta;
}
static struct sas_task *sas_create_task(struct scsi_cmnd *cmd,
struct domain_device *dev,
gfp_t gfp_flags)
@ -160,7 +149,7 @@ static struct sas_task *sas_create_task(struct scsi_cmnd *cmd,
task->ssp_task.retry_count = 1;
int_to_scsilun(cmd->device->lun, &lun);
memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8);
task->ssp_task.task_attr = sas_scsi_get_task_attr(cmd);
task->ssp_task.task_attr = TASK_ATTR_SIMPLE;
memcpy(task->ssp_task.cdb, cmd->cmnd, 16);
task->scatter = scsi_sglist(cmd);

6
include/scsi/scsi_tcq.h
View File

@ -97,13 +97,9 @@ static inline void scsi_deactivate_tcq(struct scsi_device *sdev, int depth)
static inline int scsi_populate_tag_msg(struct scsi_cmnd *cmd, char *msg)
{
struct request *req = cmd->request;
struct scsi_device *sdev = cmd->device;
if (blk_rq_tagged(req)) {
if (sdev->ordered_tags && req->cmd_flags & REQ_HARDBARRIER)
*msg++ = MSG_ORDERED_TAG;
else
*msg++ = MSG_SIMPLE_TAG;
*msg++ = MSG_SIMPLE_TAG;
*msg++ = req->tag;
return 2;
}