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sbp2: fix another deadlock after disconnection 

If there were commands enqueued but not completed before an SBP-2 unit
was unplugged (or an attempt to reconnect failed), knodemgrd or any
process which tried to remove the device would sleep uninterruptibly
in blk_execute_rq().  Therefore make sure that all commands are
completed when sbp2 retreats.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>
(cherry picked from 61daa34c132c5d4ed8630e2c46e9bf2f0c7b3428 commit)
This commit is contained in:
Stefan Richter 2006-01-31 00:13:06 -05:00 committed by Jody McIntyre
parent 9e956c2dac
commit bf637ec3ef
1 changed files with 8 additions and 2 deletions
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10
drivers/ieee1394/sbp2.c
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@ -643,9 +643,15 @@ static int sbp2_remove(struct device *dev)
if (!scsi_id)
return 0;
/* Trigger shutdown functions in scsi's highlevel. */
if (scsi_id->scsi_host)
if (scsi_id->scsi_host) {
/* Get rid of enqueued commands if there is no chance to
* send them. */
if (!sbp2util_node_is_available(scsi_id))
sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
/* scsi_remove_device() will trigger shutdown functions of SCSI
* highlevel drivers which would deadlock if blocked. */
scsi_unblock_requests(scsi_id->scsi_host);
}
sdev = scsi_id->sdev;
if (sdev) {
scsi_id->sdev = NULL;