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NVMe: Clear QUEUE_FLAG_STACKABLE

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The nvme namespace request_queue's flags are initialized to
QUEUE_FLAG_DEFAULT, which currently sets QUEUE_FLAG_STACKABLE. The
device-mapper indicates this flag means the block driver is requset
based, though this driver is bio-based and problems will occur if an nvme
namespace is used with a request based dm device. This patch clears the
stackable flag.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2014-11-04 13:18:10 -07:00 committed by Jens Axboe
parent 387caa5a2b
commit 5940c8578f
1 changed files with 1 additions and 0 deletions
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1
drivers/block/nvme-core.c
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@ -2030,6 +2030,7 @@ static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid,
if (!ns->queue)
goto out_free_ns;
ns->queue->queue_flags = QUEUE_FLAG_DEFAULT;
queue_flag_clear_unlocked(QUEUE_FLAG_STACKABLE, ns->queue);
queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue);
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue);
queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, ns->queue);