diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2016-09-01 12:06:37 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-28 03:45:21 -0400 |
| commit | df5c2ee063903af62f5126e085e5c25de9fb4d7d (patch) | |
| tree | ef292120dbb02e4a4252fcd6b5145a5bc2d8a154 | |
| parent | 4a48b94239422c2c3c89b79dbbc39a1e2981babb (diff) | |
dm mpath: check if path's request_queue is dying in activate_path()
commit f10e06b744074824fb8ec7066bc03ecc90918f5b upstream.
If pg_init_retries is set and a request is queued against a multipath
device with all underlying block device request_queues in the "dying"
state then an infinite loop is triggered because activate_path() never
succeeds and hence never calls pg_init_done().
This change avoids that device removal triggers an infinite loop by
failing the activate_path() which causes the "dying" path to be failed.
Reported-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/dm-mpath.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index ac734e5bbe48..15db5e9c572e 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -1521,10 +1521,10 @@ static void activate_path(struct work_struct *work) { struct pgpath *pgpath = container_of(work, struct pgpath, activate_path.work); + struct request_queue *q = bdev_get_queue(pgpath->path.dev->bdev); - if (pgpath->is_active) - scsi_dh_activate(bdev_get_queue(pgpath->path.dev->bdev), - pg_init_done, pgpath); + if (pgpath->is_active && !blk_queue_dying(q)) + scsi_dh_activate(q, pg_init_done, pgpath); else pg_init_done(pgpath, SCSI_DH_DEV_OFFLINED); } |