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[SCSI] fc transport: pre-emptively terminate i/o upon dev_loss_tmo timeout 

Pre-emptively terminate i/o on the rport if dev_loss_tmo has fired.
The desire is to terminate everything, so that the i/o is cleaned up
prior to the sdev's being unblocked, thus any outstanding timeouts/aborts
are avoided.

Also, we do this early enough such that the rport's port_id field is
still valid. FCOE libFC code needs this info to find the i/o's to
terminate.

Signed-off-by: James Smart <james.smart@emulex.com>
[michaelc@cs.wisc.edu: remove extra scsi_target_unblock call]
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Smart 2008-12-05 16:29:59 -06:00 committed by James Bottomley
parent 73208dfd7a
commit f78badb1ae
1 changed files with 10 additions and 3 deletions
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13
drivers/scsi/scsi_transport_fc.c
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@ -3012,6 +3012,16 @@ fc_timeout_deleted_rport(struct work_struct *work)
rport->port_state = FC_PORTSTATE_NOTPRESENT;
rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
/*
* Pre-emptively kill I/O rather than waiting for the work queue
* item to teardown the starget. (FCOE libFC folks prefer this
* and to have the rport_port_id still set when it's done).
*/
spin_unlock_irqrestore(shost->host_lock, flags);
fc_terminate_rport_io(rport);
BUG_ON(rport->port_state != FC_PORTSTATE_NOTPRESENT);
/* remove the identifiers that aren't used in the consisting binding */
switch (fc_host->tgtid_bind_type) {
case FC_TGTID_BIND_BY_WWPN:
@ -3035,9 +3045,6 @@ fc_timeout_deleted_rport(struct work_struct *work)
* went away and didn't come back - we'll remove
* all attached scsi devices.
*/
spin_unlock_irqrestore(shost->host_lock, flags);
scsi_target_unblock(&rport->dev);
fc_queue_work(shost, &rport->stgt_delete_work);
}