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| author | Mike Snitzer <snitzer@redhat.com> | 2016-09-01 12:06:37 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-28 03:01:28 -0400 |
| commit | 293441e493cc35e8f3a0a9d79ca3cdd29bfd1afe (patch) | |
| tree | bb4bf5b9758611249d91061141fbe27c4b0619a7 /drivers | |
| parent | bf74a108c67947a2c72d16786338b89d75119a48 (diff) | |
| download | linux-stable-293441e493cc35e8f3a0a9d79ca3cdd29bfd1afe.tar.gz linux-stable-293441e493cc35e8f3a0a9d79ca3cdd29bfd1afe.tar.bz2 linux-stable-293441e493cc35e8f3a0a9d79ca3cdd29bfd1afe.zip | |
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>
Diffstat (limited to 'drivers')
| -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 cfa29f574c2a..5b2ef966012b 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -1220,10 +1220,10 @@ 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); } |