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scsi: fas216: Kill scmd->tag

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The driver is attempting to allocate a tag internally which is a no-go with
blk-mq. Switch the driver to use the request tag and kill usage of
scmd->tag and scmd->device->current_tag.

[jpg: Change to use scsi_cmd_to_rq()]

Link: https://lore.kernel.org/r/1631696835-136198-2-git-send-email-john.garry@huawei.com
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2021-09-15 17:07:13 +08:00 • committed by Martin K. Petersen
parent 5f85790388
commit bc41fcbffd
1 changed files with 8 additions and 23 deletions
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31
drivers/scsi/arm/fas216.c
View file

@ -77,7 +77,6 @@
* I was thinking that this was a good chip until I found this restriction ;(
*/
#define SCSI2_SYNC
#undef SCSI2_TAG
#undef DEBUG_CONNECT
#undef DEBUG_MESSAGES
@ -990,7 +989,7 @@ fas216_reselected_intr(FAS216_Info *info)
info->scsi.disconnectable = 0;
if (info->SCpnt->device->id == target &&
info->SCpnt->device->lun == lun &&
info->SCpnt->tag == tag) {
scsi_cmd_to_rq(info->SCpnt)->tag == tag) {
fas216_log(info, LOG_CONNECT, "reconnected previously executing command");
} else {
queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
@ -1791,8 +1790,9 @@ static void fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt)
/*
* add tag message if required
*/
if (SCpnt->tag)
msgqueue_addmsg(&info->scsi.msgs, 2, SIMPLE_QUEUE_TAG, SCpnt->tag);
if (SCpnt->device->simple_tags)
msgqueue_addmsg(&info->scsi.msgs, 2, SIMPLE_QUEUE_TAG,
scsi_cmd_to_rq(SCpnt)->tag);
do {
#ifdef SCSI2_SYNC
@ -1815,20 +1815,8 @@ static void fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt)
static void fas216_allocate_tag(FAS216_Info *info, struct scsi_cmnd *SCpnt)
{
#ifdef SCSI2_TAG
/*
* tagged queuing - allocate a new tag to this command
*/
if (SCpnt->device->simple_tags && SCpnt->cmnd[0] != REQUEST_SENSE &&
SCpnt->cmnd[0] != INQUIRY) {
SCpnt->device->current_tag += 1;
if (SCpnt->device->current_tag == 0)
SCpnt->device->current_tag = 1;
SCpnt->tag = SCpnt->device->current_tag;
} else
#endif
set_bit(SCpnt->device->id * 8 +
(u8)(SCpnt->device->lun & 0x7), info->busyluns);
set_bit(SCpnt->device->id * 8 +
(u8)(SCpnt->device->lun & 0x7), info->busyluns);
info->stats.removes += 1;
switch (SCpnt->cmnd[0]) {
@ -2117,7 +2105,6 @@ request_sense:
init_SCp(SCpnt);
SCpnt->SCp.Message = 0;
SCpnt->SCp.Status = 0;
SCpnt->tag = 0;
SCpnt->host_scribble = (void *)fas216_rq_sns_done;
/*
@ -2223,7 +2210,6 @@ static int fas216_queue_command_lck(struct scsi_cmnd *SCpnt,
init_SCp(SCpnt);
info->stats.queues += 1;
SCpnt->tag = 0;
spin_lock(&info->host_lock);
@ -3003,9 +2989,8 @@ void fas216_print_devices(FAS216_Info *info, struct seq_file *m)
dev = &info->device[scd->id];
seq_printf(m, " %d/%llu ", scd->id, scd->lun);
if (scd->tagged_supported)
seq_printf(m, "%3sabled(%3d) ",
scd->simple_tags ? "en" : "dis",
scd->current_tag);
seq_printf(m, "%3sabled ",
scd->simple_tags ? "en" : "dis");
else
seq_puts(m, "unsupported ");