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bsg: update check for rq based driver for blk-mq

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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 <[email protected]>
This commit is contained in:
Jens Axboe 2014-04-16 10:57:18 -06:00
commit 49fd524f95
2 changed files with 10 additions and 1 deletions
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block/bsg.c
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@ -1008,7 +1008,7 @@ int bsg_register_queue(struct request_queue *q, struct device *parent,
/*
* 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;