__SCSI_DEVICE_LOOKUP

Section: SCSI mid layer (9)
Updated: February 2011
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NAME

__scsi_device_lookup - find a device given the host (UNLOCKED)

SYNOPSIS

struct scsi_device * __scsi_device_lookup(struct Scsi_Host * shost, uint channel, uint id, uint lun);

ARGUMENTS

shost

: SCSI host pointer

channel

: SCSI channel (zero if only one channel)

: SCSI target number (physical unit number)

lun

: SCSI Logical Unit Number

DESCRIPTION

Looks up the scsi_device with the specified channel, id, lun for a given host. The returned scsi_device does not have an additional reference. You must hold the host's host_lock over this call and any access to the returned scsi_device.

NOTE

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.

AUTHORS

James Bottomley <James.Bottomley@hansenpartnership.com>

: Author.

Rob Landley <rob@landley.net>

: Author.