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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, u64 lun);

ARGUMENTS

struct Scsi_Host * shost
SCSI host pointer

uint channel

SCSI channel (zero if only one channel)

uint id

SCSI target number (physical unit number)

u64 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

September 2017 Kernel Hackers Manual 4.12