bsg: update check for rq based driver for blk-mq
bsg currently checks ->request_fn to check whether a queue can
handle struct request. But with blk-mq, we don't have a request_fn
yet are request based. Add a queue_is_rq_based() helper and use
that in bsg, I'm guessing this is not the last place we need to
update for this. Besides, it better explains what is being
checked.
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/block/bsg.c b/block/bsg.c
index 420a5a9..e5214c1 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -1008,7 +1008,7 @@
/*
* we need a proper transport to send commands, not a stacked device
*/
- if (!q->request_fn)
+ if (!queue_is_rq_based(q))
return 0;
bcd = &q->bsg_dev;