diff options
| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2006-01-31 06:13:06 +0100 |
|---|---|---|
| committer | Jody McIntyre <scjody@modernduck.com> | 2006-02-23 06:25:08 +0100 |
| commit | bf637ec3ef4159da3dd156ecf6f6987d8c8c5dae (patch) | |
| tree | 4d90e883515171529e74ab9446e19bc1030abe4c /drivers/ieee1394 | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 (diff) | |
| download | linux-bf637ec3ef4159da3dd156ecf6f6987d8c8c5dae.tar.xz linux-bf637ec3ef4159da3dd156ecf6f6987d8c8c5dae.zip | |
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)
Diffstat (limited to 'drivers/ieee1394')
| -rw-r--r-- | drivers/ieee1394/sbp2.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c index c2c776fbda01..8963dd484eb9 100644 --- a/drivers/ieee1394/sbp2.c +++ b/drivers/ieee1394/sbp2.c @@ -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; |