diff options
| author | Bodo Stroesser <bstroesser@ts.fujitsu.com> | 2017-08-01 15:42:54 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-08-08 18:49:51 +0300 |
| commit | 180efde0a3f43dbe533e4be203c2918793482d4e (patch) | |
| tree | 0c9dd7e01d8e3d00c2e634fd378feee39cb45569 | |
| parent | be37aa4b993bd5d4191f76a7bd43be33f987b972 (diff) | |
| download | linux-180efde0a3f43dbe533e4be203c2918793482d4e.tar.xz | |
scsi: st: fix blk_get_queue usage
If blk_queue_get() in st_probe fails, disk->queue must not be set to
SDp->request_queue, as that would result in put_disk() dropping a not
taken reference.
Thus, disk->queue should be set only after a successful blk_queue_get().
Fixes: 2b5bebccd282 ("st: Take additional queue ref in st_probe")
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Acked-by: Shirish Pargaonkar <spargaonkar@suse.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Acked-by: Kai Mäkisara <kai.makisara@kolumbus.fi>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/st.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 8e5013d9cad4..94e402ed30f6 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -4299,11 +4299,11 @@ static int st_probe(struct device *dev) kref_init(&tpnt->kref); tpnt->disk = disk; disk->private_data = &tpnt->driver; - disk->queue = SDp->request_queue; /* SCSI tape doesn't register this gendisk via add_disk(). Manually * take queue reference that release_disk() expects. */ - if (!blk_get_queue(disk->queue)) + if (!blk_get_queue(SDp->request_queue)) goto out_put_disk; + disk->queue = SDp->request_queue; tpnt->driver = &st_template; tpnt->device = SDp; |