SCSI_DEVICE_QUIESCE(9)                    SCSI mid layer                   SCSI_DEVICE_QUIESCE(9)



NAME
       scsi_device_quiesce - Block user issued commands.

SYNOPSIS
       int scsi_device_quiesce(struct scsi_device * sdev);

ARGUMENTS
       sdev
           scsi device to quiesce.

DESCRIPTION
       This works by trying to transition to the SDEV_QUIESCE state (which must be a legal
       transition). When the device is in this state, only special requests will be accepted, all
       others will be deferred. Since special requests may also be requeued requests, a
       successful return doesn't guarantee the device will be totally quiescent.

       Must be called with user context, may sleep.

       Returns zero if unsuccessful or an error if not.

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_QUIESCE(9)