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authorStefan Richter <stefanr@s5r6.in-berlin.de>2006-01-31 00:13:06 -0500
committerJody McIntyre <scjody@modernduck.com>2006-02-23 00:25:08 -0500
commitbf637ec3ef4159da3dd156ecf6f6987d8c8c5dae (patch)
tree4d90e883515171529e74ab9446e19bc1030abe4c
parent9e956c2dac9bec602ed1ba29181b45ba6d2b6448 (diff)
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)
-rw-r--r--drivers/ieee1394/sbp2.c10
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;