'\" t
.\"     Title: __scsi_device_lookup
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: SCSI mid layer
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "__SCSI_DEVICE_LOOKUP" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "SCSI mid layer"
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.SH "NAME"
__scsi_device_lookup \- find a device given the host (UNLOCKED)
.SH "SYNOPSIS"
.HP \w'struct\ scsi_device\ *\ __scsi_device_lookup('u
.BI "struct scsi_device * __scsi_device_lookup(struct\ Scsi_Host\ *\ " "shost" ", uint\ " "channel" ", uint\ " "id" ", u64\ " "lun" ");"
.SH "ARGUMENTS"
.PP
\fIshost\fR
.RS 4
SCSI host pointer
.RE
.PP
\fIchannel\fR
.RS 4
SCSI channel (zero if only one channel)
.RE
.PP
\fIid\fR
.RS 4
SCSI target number (physical unit number)
.RE
.PP
\fIlun\fR
.RS 4
SCSI Logical Unit Number
.RE
.SH "DESCRIPTION"
.PP
Looks up the scsi_device with the specified
\fIchannel\fR,
\fIid\fR,
\fIlun\fR
for a given host\&. The returned scsi_device does not have an additional reference\&. You must hold the host\*(Aqs host_lock over this call and any access to the returned scsi_device\&.
.SH "NOTE"
.PP
The only reason why drivers would want to use this is because they need to access the device list in irq context\&. Otherwise you really want to use scsi_device_lookup instead\&.
.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