nvme-tcp: fix possible hang when failing to set io queues
commit72f572428b
upstream. We only setup io queues for nvme controllers, and it makes absolutely no sense to allow a controller (re)connect without any I/O queues. If we happen to fail setting the queue count for any reason, we should not allow this to be a successful reconnect as I/O has no chance in going through. Instead just fail and schedule another reconnect. Fixes:3f2304f8c6
("nvme-tcp: add NVMe over TCP host driver") Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1748,8 +1748,11 @@ static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl)
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return ret;
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ctrl->queue_count = nr_io_queues + 1;
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if (ctrl->queue_count < 2)
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return 0;
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if (ctrl->queue_count < 2) {
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dev_err(ctrl->device,
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"unable to set any I/O queues\n");
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return -ENOMEM;
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}
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dev_info(ctrl->device,
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"creating %d I/O queues.\n", nr_io_queues);
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