centos man page for scsi_internal_device_block

SCSI_INTERNAL_DEVICE(9) 					  SCSI mid layer					   SCSI_INTERNAL_DEVICE(9)

NAME
       scsi_internal_device_block - internal function to put a device temporarily into the SDEV_BLOCK state

SYNOPSIS
       int scsi_internal_device_block(struct scsi_device * sdev);

ARGUMENTS
       sdev
	   device to block

DESCRIPTION
       Block request made by scsi lld's to temporarily stop all scsi commands on the specified device. Called from interrupt or normal process
       context.

       Returns zero if successful or error if not

NOTES
       This routine transitions the device to the SDEV_BLOCK state (which must be a legal transition). When the device is in this state, all
       commands are deferred until the scsi lld reenables the device with scsi_device_unblock or device_block_tmo fires.

AUTHORS
       James Bottomley <James.Bottomley@hansenpartnership.com>
	   Author.

       Rob Landley <rob@landley.net>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   SCSI_INTERNAL_DEVICE(9)