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authorChristoph Hellwig <hch@lst.de>2014-11-03 14:09:02 +0100
committerChristoph Hellwig <hch@lst.de>2014-11-12 11:19:43 +0100
commit2ecb204d07ac8debe3893c362415919bc78bebd6 (patch)
treeeef99b324201b21de358dffdab8bfc0453358d5f /drivers/scsi/lpfc
parente2eddf4d530df745019fded0fedfb78f6d3e33ca (diff)
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/lpfc')
-rw-r--r--drivers/scsi/lpfc/lpfc_scsi.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 4a150063fb4d..a24106a70968 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -5598,10 +5598,7 @@ lpfc_slave_configure(struct scsi_device *sdev)
struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
struct lpfc_hba *phba = vport->phba;
- if (sdev->tagged_supported)
- scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
- else
- scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
+ scsi_adjust_queue_depth(sdev, 0, vport->cfg_lun_queue_depth);
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
lpfc_sli_handle_fast_ring_event(phba,
@@ -5986,6 +5983,7 @@ struct scsi_host_template lpfc_template = {
.vendor_id = LPFC_NL_VENDOR_ID,
.change_queue_depth = lpfc_change_queue_depth,
.change_queue_type = scsi_change_queue_type,
+ .use_blk_tags = 1,
};
struct scsi_host_template lpfc_vport_template = {
@@ -6009,4 +6007,5 @@ struct scsi_host_template lpfc_vport_template = {
.max_sectors = 0xFFFF,
.change_queue_depth = lpfc_change_queue_depth,
.change_queue_type = scsi_change_queue_type,
+ .use_blk_tags = 1,
};