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Date: Thu, 24 May 2018 17:51:34 +0800 From: Jianchao Wang <jianchao.w.wang@...cle.com> To: keith.busch@...el.com, axboe@...com, hch@....de, sagi@...mberg.me Cc: linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH 2/2] nvme-pci: don't send delete cq command when allocate sq return -EINTR When allocate sq in nvme_create_queue return -EINTR, it means the allocate sq command times out and is completed with NVME_REQ_CANCELLED. At the moment, the controller has been disabled and admin request queue has been quiesced. Don't send delete cq command, otherwise, it will incur io hang. Signed-off-by: Jianchao Wang <jianchao.w.wang@...cle.com> --- drivers/nvme/host/pci.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 70b79f2..4ce1c89 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1478,7 +1478,15 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) goto out; result = adapter_alloc_sq(dev, qid, nvmeq); - if (result < 0) + /* + * If return -EINTR, it means the allocate sq command times out and is completed + * with NVME_REQ_CANCELLED. At the time, the controller has been disabled + * and admin request queue has been quiesced. So don't try to send delete cq + * command any more. + */ + if (result == -EINTR) + goto out; + else if (result < 0) goto release_cq; /* -- 2.7.4
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