__scsi_device_lookup man page on Scientific

__scsi_device_lookup man page on Scientific

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__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,
						 uint 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@hansenpartnership.com>
	   Author.

       Rob Landley <rob@landley.net>
	   Author.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013	       __SCSI_DEVICE_LOOKUP(9)

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