__SCSI_DEVICE_LOOKUP(9)                   SCSI mid layer                  __SCSI_DEVICE_LOOKUP(9)



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,
                                                 u64 lun);

ARGUMENTS
       shost
           SCSI host pointer

       channel
           SCSI channel (zero if only one channel)

       id
           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 AT hansenpartnership.com>
           Author.

       Rob Landley <rob AT landley.net>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   __SCSI_DEVICE_LOOKUP(9)