diff options
| author | Christoph Hellwig <hch@lst.de> | 2014-11-13 16:25:11 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-11-24 16:45:12 +0300 |
| commit | c40ecc12cfdb630332198a04e2832ae8218a61f1 (patch) | |
| tree | 881456a7d46ca017dba4cc003e2fe1be427614fc /include/scsi | |
| parent | 89dac7bb3b0494685241369951f95494e86ee61f (diff) | |
| download | linux-c40ecc12cfdb630332198a04e2832ae8218a61f1.tar.xz | |
scsi: avoid ->change_queue_depth indirection for queue full tracking
All drivers use the implementation for ramping the queue up and down, so
instead of overloading the change_queue_depth method call the
implementation diretly if the driver opts into it by setting the
track_queue_depth flag in the host template.
Note that a few drivers validated the new queue depth in their
change_queue_depth method, but as we never go over the queue depth
set during slave_configure or the sysfs file this isn't nessecary
and can safely be removed.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Venkatesh Srinivas <venkateshs@google.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_host.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 61a81bf77e28..a0b13a5cd25e 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -48,8 +48,6 @@ struct blk_queue_tags; enum { SCSI_QDEPTH_DEFAULT, /* default requested change, e.g. from sysfs */ - SCSI_QDEPTH_QFULL, /* scsi-ml requested due to queue full */ - SCSI_QDEPTH_RAMP_UP, /* scsi-ml requested due to threshold event */ }; struct scsi_host_template { @@ -427,6 +425,11 @@ struct scsi_host_template { unsigned use_blk_tags:1; /* + * Track QUEUE_FULL events and reduce queue depth on demand. + */ + unsigned track_queue_depth:1; + + /* * This specifies the mode that a LLD supports. */ unsigned supported_mode:2; |