scsi_internal_device_block — internal function to put a device temporarily into the SDEV_BLOCK state
int scsi_internal_device_block ( | struct scsi_device * sdev, |
bool wait); |
sdevdevice to block
wait
Whether or not to wait until ongoing .queuecommand /
.queue_rq calls have finished.
Block request made by scsi lld's to temporarily stop all scsi commands on the specified device. May sleep.
Returns zero if successful or error if not
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.
avoid that scsi_send_eh_cmnd calls queuecommand after
scsi_internal_device_block has blocked a SCSI device and also
remove the rport mutex lock and unlock calls from srp_queuecommand.