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NVMe: Freeze admin queue on device failure

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This fixes a race accessing an invalid address when a controller's admin
queue is in use during a reset for failure or hot removal occurs. The
admin queue will be frozen to prevent new users from entering prior to
the doorbell queue being unmapped.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2015-03-26 13:49:33 -06:00 committed by Jens Axboe
parent cbc4ffdbe7
commit 6df3dbc83f
1 changed files with 3 additions and 2 deletions
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5
drivers/block/nvme-core.c
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@ -1347,6 +1347,9 @@ static int nvme_suspend_queue(struct nvme_queue *nvmeq)
nvmeq->cq_vector = -1;
spin_unlock_irq(&nvmeq->q_lock);
if (!nvmeq->qid && nvmeq->dev->admin_q)
blk_mq_freeze_queue_start(nvmeq->dev->admin_q);
irq_set_affinity_hint(vector, NULL);
free_irq(vector, nvmeq);
@ -1378,8 +1381,6 @@ static void nvme_disable_queue(struct nvme_dev *dev, int qid)
adapter_delete_sq(dev, qid);
adapter_delete_cq(dev, qid);
}
if (!qid && dev->admin_q)
blk_mq_freeze_queue_start(dev->admin_q);
spin_lock_irq(&nvmeq->q_lock);
nvme_process_cq(nvmeq);