'\" t
.\"     Title: scsi_track_queue_full
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: SCSI mid layer
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SCSI_TRACK_QUEUE_FUL" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "SCSI mid layer"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
scsi_track_queue_full \- track QUEUE_FULL events to adjust queue depth
.SH "SYNOPSIS"
.HP \w'int\ scsi_track_queue_full('u
.BI "int scsi_track_queue_full(struct\ scsi_device\ *\ " "sdev" ", int\ " "depth" ");"
.SH "ARGUMENTS"
.PP
\fIsdev\fR
.RS 4
SCSI Device in question
.RE
.PP
\fIdepth\fR
.RS 4
Current number of outstanding SCSI commands on this device, not counting the one returned as QUEUE_FULL\&.
.RE
.SH "DESCRIPTION"
.PP
This function will track successive QUEUE_FULL events on a specific SCSI device to determine if and when there is a need to adjust the queue depth on the device\&.
.SH "RETURN"
.PP
0 \- No change needed, >0 \- Adjust queue depth to this new depth, \-1 \- Drop back to untagged operation using host\->cmd_per_lun as the untagged command depth
.PP
Lock Status: None held on entry
.SH "NOTES"
.PP
Low level drivers may call this at any time and we will do
\(lqThe Right Thing\&.\(rq
We are interrupt context safe\&.
.SH "AUTHORS"
.PP
\fBJames Bottomley\fR <\&James.Bottomley@hansenpartnership.com\&>
.RS 4
Author.
.RE
.PP
\fBRob Landley\fR <\&rob@landley.net\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br