diff options
| author | Christoph Hellwig <hch@lst.de> | 2014-11-03 16:09:02 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-11-12 13:19:43 +0300 |
| commit | 2ecb204d07ac8debe3893c362415919bc78bebd6 (patch) | |
| tree | eef99b324201b21de358dffdab8bfc0453358d5f /drivers/scsi/aic7xxx/aic7xxx_osm.c | |
| parent | e2eddf4d530df745019fded0fedfb78f6d3e33ca (diff) | |
| download | linux-2ecb204d07ac8debe3893c362415919bc78bebd6.tar.xz | |
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/aic7xxx/aic7xxx_osm.c')
| -rw-r--r-- | drivers/scsi/aic7xxx/aic7xxx_osm.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c index 33a5f959e86a..f18b6d69d3fb 100644 --- a/drivers/scsi/aic7xxx/aic7xxx_osm.c +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c @@ -812,6 +812,7 @@ struct scsi_host_template aic7xxx_driver_template = { .slave_configure = ahc_linux_slave_configure, .target_alloc = ahc_linux_target_alloc, .target_destroy = ahc_linux_target_destroy, + .use_blk_tags = 1, }; /**************************** Tasklet Handler *********************************/ @@ -1334,12 +1335,12 @@ ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, } switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { case AHC_DEV_Q_BASIC: - scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); - scsi_activate_tcq(sdev, dev->openings + dev->active); + scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TASK, + dev->openings + dev->active); break; case AHC_DEV_Q_TAGGED: - scsi_set_tag_type(sdev, MSG_ORDERED_TAG); - scsi_activate_tcq(sdev, dev->openings + dev->active); + scsi_adjust_queue_depth(sdev, MSG_ORDERED_TASK, + dev->openings + dev->active); break; default: /* @@ -1348,7 +1349,7 @@ ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, * serially on the controller/device. This should * remove some latency. */ - scsi_deactivate_tcq(sdev, 2); + scsi_adjust_queue_depth(sdev, 0, 2); break; } } |