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Commit 8fe34be1 authored by yangerkun's avatar yangerkun Committed by Christoph Hellwig
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Revert "nvme-pci: don't create a read hctx mapping without read queues" 



This reverts commit 0298d543.

With this patch, set 'poll_queues > hard queues' will lead to 'nr_read_queues = 0'
in nvme_calc_irq_sets. Then poll_queues setting can fail since dev->tagset.nr_maps
equals to 2 and nvme_pci_map_queues will not do map for poll queues.

Signed-off-by: default avataryangerkun <yangerkun@huawei.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 66b20ac0

drivers/nvme/host/pci.c

+1 −3
Original line number Diff line number Diff line
@@ -2254,9 +2254,7 @@ static int nvme_dev_add(struct nvme_dev *dev) 
	if (!dev->ctrl.tagset) {

		dev->tagset.ops = &nvme_mq_ops;

		dev->tagset.nr_hw_queues = dev->online_queues - 1;

		dev->tagset.nr_maps = 1; /* default */

		if (dev->io_queues[HCTX_TYPE_READ])

			dev->tagset.nr_maps++;

		dev->tagset.nr_maps = 2; /* default + read */

		if (dev->io_queues[HCTX_TYPE_POLL])

			dev->tagset.nr_maps++;

		dev->tagset.timeout = NVME_IO_TIMEOUT;