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| author | Christoph Hellwig <hch@lst.de> | 2014-11-03 14:09:02 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-11-12 11:19:43 +0100 |
| commit | 2ecb204d07ac8debe3893c362415919bc78bebd6 (patch) | |
| tree | eef99b324201b21de358dffdab8bfc0453358d5f /drivers/scsi/libsas | |
| parent | e2eddf4d530df745019fded0fedfb78f6d3e33ca (diff) | |
| download | blackbird-op-linux-2ecb204d07ac8debe3893c362415919bc78bebd6.tar.gz blackbird-op-linux-2ecb204d07ac8debe3893c362415919bc78bebd6.zip | |
scsi: always assign block layer tags if enabled
Allow a driver to ask for block layer tags by setting .use_blk_tags in the
host template, in which case it will always see a valid value in
request->tag, similar to the behavior when using blk-mq. This means even
SCSI "untagged" commands will now have a tag, which is especially useful
when using a host-wide tag map.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Diffstat (limited to 'drivers/scsi/libsas')
| -rw-r--r-- | drivers/scsi/libsas/sas_scsi_host.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 24e477d2ea70..eee21a060d93 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -940,15 +940,13 @@ int sas_slave_configure(struct scsi_device *scsi_dev) sas_read_port_mode_page(scsi_dev); if (scsi_dev->tagged_supported) { - scsi_set_tag_type(scsi_dev, MSG_SIMPLE_TAG); - scsi_activate_tcq(scsi_dev, SAS_DEF_QD); + scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG, SAS_DEF_QD); } else { SAS_DPRINTK("device %llx, LUN %llx doesn't support " "TCQ\n", SAS_ADDR(dev->sas_addr), scsi_dev->lun); scsi_dev->tagged_supported = 0; - scsi_set_tag_type(scsi_dev, 0); - scsi_deactivate_tcq(scsi_dev, 1); + scsi_adjust_queue_depth(scsi_dev, 0, 1); } scsi_dev->allow_restart = 1; @@ -991,10 +989,7 @@ int sas_change_queue_type(struct scsi_device *scsi_dev, int qt) if (!scsi_dev->tagged_supported) return 0; - scsi_deactivate_tcq(scsi_dev, 1); - - scsi_set_tag_type(scsi_dev, qt); - scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); + scsi_adjust_queue_depth(scsi_dev, qt, scsi_dev->queue_depth); return qt; } |
