SCSI_INTERNAL_DEVICE(9) SCSI mid layer SCSI_INTERNAL_DEVICE(9)NAMEscsi_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 lldĀ“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. This routine assumes the
host_lock is held on entry.
AUTHORS
James Bottomley <James.Bottomley@hansenpartnership.com>
Author.
Rob Landley <rob@landley.net>
Author.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 SCSI_INTERNAL_DEVICE(9)