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Commit 7a509a6b authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe
Browse files

NVMe: Fix locking on abort handling 



The queues and device need to be locked when messing with them.

Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent c9d3bf88

drivers/block/nvme-core.c

+19 −10
Original line number Diff line number Diff line
@@ -1021,14 +1021,19 @@ static void nvme_abort_req(struct request *req) 
	struct nvme_command cmd;



	if (!nvmeq->qid || cmd_rq->aborted) {

		unsigned long flags;



		spin_lock_irqsave(&dev_list_lock, flags);

		if (work_busy(&dev->reset_work))

			return;

			goto out;

		list_del_init(&dev->node);

		dev_warn(&dev->pci_dev->dev,

			"I/O %d QID %d timeout, reset controller\n",

							req->tag, nvmeq->qid);

		dev->reset_workfn = nvme_reset_failed_dev;

		queue_work(nvme_workq, &dev->reset_work);

 out:

		spin_unlock_irqrestore(&dev_list_lock, flags);

		return;

	}
@@ -1096,25 +1101,29 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) 
	struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req);

	struct nvme_queue *nvmeq = cmd->nvmeq;



	/*

	 * The aborted req will be completed on receiving the abort req.

	 * We enable the timer again. If hit twice, it'll cause a device reset,

	 * as the device then is in a faulty state.

	 */

	int ret = BLK_EH_RESET_TIMER;



	dev_warn(nvmeq->q_dmadev, "Timeout I/O %d QID %d\n", req->tag,

							nvmeq->qid);



	spin_lock_irq(&nvmeq->q_lock);

	if (!nvmeq->dev->initialized) {

		/*

		 * Force cancelled command frees the request, which requires we

		 * return BLK_EH_NOT_HANDLED.

		 */

		nvme_cancel_queue_ios(nvmeq->hctx, req, nvmeq, reserved);

		return BLK_EH_NOT_HANDLED;

	}

		ret = BLK_EH_NOT_HANDLED;

	} else

		nvme_abort_req(req);

	spin_unlock_irq(&nvmeq->q_lock);



	/*

	 * The aborted req will be completed on receiving the abort req.

	 * We enable the timer again. If hit twice, it'll cause a device reset,

	 * as the device then is in a faulty state.

	 */

	return BLK_EH_RESET_TIMER;

	return ret;

}



static void nvme_free_queue(struct nvme_queue *nvmeq)